The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC)... more The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100 % of the center frequency. Successful transmission and reception of an Ultra Wideband pulse that occupies the entire 3.1-10.6 GHz spectrum require an antenna that has linear phase, low dispersion and VSWR 2 throughout the entire band. Linear phase and low dispersion ensure low values of group delay, which is imperative for transmitting and receiving a pulse with minimal distortion. VSWR 2 is required for proper impedance matching throughout the band, ensuring at least 90 % total power radiation. Compatibility with an integrated circuit also requires an unobtrusive, electrically small design. The focus of this thesis is to develop an antenna fo...
— This paper presents analysis of a digital Ultrawideband (UWB) radio receiver operating in the 3... more — This paper presents analysis of a digital Ultrawideband (UWB) radio receiver operating in the 3.1 GHz to 10.6 GHz band. Analog to digital converter (ADC) bit precision is analyzed on two types of UWB signals- OFDM UWB and pulsed UWB- all in the presence of Additive White Gaussian Noise (AWGN) and a narrowband interferer in the channel. This paper shows how probability of error and the bit resolution of the ADC can be scaled depending on the Signal to Noise Ratio (SNR), Signal to Interference Ratio (SIR), and the type of UWB signal. It also includes considerations on timing recovery for pulsed UWB. I.
Ultra-wideband (UWB) communication is an emerging wireless technology that promises high data rat... more Ultra-wideband (UWB) communication is an emerging wireless technology that promises high data rates over short distances and precise locationing. The large available bandwidth and the constraint of a maximum power spectral density drives a unique set of system challenges. This paper addresses these challenges using two UWB transceivers and a discrete prototype platform. 1. System considerations The use of ultra-wideband signals for communication purposes is approved by the FCC from 3.1 to 10.6 GHz with a maximum effective isotropic radiated power spectral density of-41.3 dBm/MHz. An effective high data rate transceiver in this band should provide robust communication under severe multipath conditions (rms
— A complete 3.1-10.6 GHz ultra-wideband receiver using 500 MHz-wide sub-banded binary phase shif... more — A complete 3.1-10.6 GHz ultra-wideband receiver using 500 MHz-wide sub-banded binary phase shift keyed (BPSK) pulses has been specified, designed and integrated as a three chip and planar antenna solution. The system includes a custom designed 3.1-10.6 GHz planar antenna, direct-conversion RF front-end, 500 MS/s analog to digital converters, and a parallelized digital back-end for signal detection and demodulation. A 100 Mb/s wireless link has been established with this chipset. A bit-error-rate (BER) of 10-3 was recorded at-80 dBm at a rate of 100 Mb/s for properly acquired packets in the lowest frequency band. Bit-scaling of the ADC from 1 to 5 bits reveals a 4 dB improvement in the link budget.
This paper introduces differential and single ended antenna designs for Ultra Wideband 3.1-10.6 G... more This paper introduces differential and single ended antenna designs for Ultra Wideband 3.1-10.6 GHz communication. The primary design is an ultra thin, low profile differential antenna with an incorporated ground plane for use with a UWB IC receiver. The differential capability eases the design complexity of the RF Front-End, and the incorporation of a ground plane enables conformability with small electronic UWB devices. Two single ended designs are also presented for use with a UWB IC transmitter. Both designs result in excellent bandwidth, efficiency, and nearly omnidirectional radiation patterns. Viability of these antennas is tested with a UWB pulse transmitter. Time domain responses are compared to that of a commercial 1-18GHz double ridged waveguide horn.
This article discusses issues associated with high-data-rate pulsed ultra-wideband system design,... more This article discusses issues associated with high-data-rate pulsed ultra-wideband system design, including the baseband processing, transmitter, antenna, receiver, and analog-to-digital conversion. A modular platform is presented that can be used for developing system specifications and prototyping designs. This prototype modulates data with binary phase shift keyed pulses, communicates over a wireless link using UWB antennas and a wideband direct conversion front-end, and samples the received signal for demodulation. Design considerations are introduced for a custom chipset that will operate in the 3.1–10.6 GHz band. The chipset is being designed using the results from the discrete prototype.
The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC)... more The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100% of the center frequency. Successful transmission and reception of an Ultra Wideband pulse that occupies the entire 3.1-10.6 GHz spectrum require an antenna that has linear phase, low dispersion and VSWR ≤ 2 throughout the entire band. Linear phase and low dispersion ensure low values of group delay, which is imperative for transmitting and receiving a pulse with minimal distortion. VSWR ≤ 2 is required for proper impedance matching throughout the band, ensuring at least 90% total power radiation. Compatibility with an integrated circuit also requires an unobtrusive, electrically small design. The focus of this thesis is to develop an antenna for the UWB 3.1-10.6 GHz band that achieves a physically compact, planar profile, sufficient impedance bandwidth, high radiation pattern and near omnidirectional radiation pattern.
Ultra-wideband (UWB) radio is a new wireless technology that was recently approved for commercial... more Ultra-wideband (UWB) radio is a new wireless technology that was recently approved for commercial use by the Federal Communications Commission. Depending on the application, it utilizes bandwidth from DC to 960MHz, or 3.1 to 10.6GHz. Contrary to traditional narrowband, single-tone radio signals, a UWB signal is typically composed of a pulse train of sub-nanosecond pulses modulated either in polarity or position as shown in Figure 1. The narrowness of the pulses in time corresponds to a wide bandwidth in the frequency domain. Since the total power is spread over such a wide swath of frequencies, its power spectral density is extremely low. This minimizes the interference caused to existing services that already use the same spectrum. On account of the large bandwidth used, UWB links are capable of transmitting data over tens of megabits per second. Other benefits include low probability of interference and detection, and precise positioning capability.
Johnna Powell and Anantha Chandrakasan Massachusetts Institute of Technology 50 Vassar St. Rm 38-... more Johnna Powell and Anantha Chandrakasan Massachusetts Institute of Technology 50 Vassar St. Rm 38-107, Cambridge, MA 02139 johnna, anantha@mtl.mit.edu ABSTRACT This paper introduces two antenna designs for Ultra Wideband 3.1-10.6 GHz communication. The primary antenna design is an equiangular spiral slot patch antenna with an outer radius of 2.25 cm. The incorporation of a ground plane enables conformability with small electronic UWB devices. Also, a circular disc monopole is designed and tested. Viability of these antennas is tested with a UWB pulse transmitter. Time domain responses are compared to that of a commercial 1-18GHz double ridged waveguide horn.
The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC)... more The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100% of the center frequency. Successful transmission and reception of an Ultra Wideband pulse that occupies the entire 3.1-10.6 GHz spectrum require an antenna that has linear phase, low dispersion and VSWR 2 throughout the entire band. Linear phase and low dispersion ensure low values of group delay, which is imperative for transmitting and receiving a pulse with minimal distortion. VSWR 2 is required for proper impedance matching throughout the band, ensuring at least 90% total power radiation. Compatibility with an integrated circuit also requires an unobtrusive, electrically small design. The focus of this thesis is to develop an antenna for ...
2006 IEEE Asian Solid-State Circuits Conference, 2006
Double-conversion superheterodyne downconverter blocks operating around 77 GHz and 94 GHz have be... more Double-conversion superheterodyne downconverter blocks operating around 77 GHz and 94 GHz have been realized in 0.13-mum SiGe BiCMOS technology. Both use a single-balanced RF mixer to downconvert the signal to an 8.8 GHz IF, which is amplified and downconverted a second time to baseband. The 77-GHz circuit achieves an upper SSB NF of 12.8 dB at 77 GHz and <12 dB at 76 GHz, with 20 dB of conversion gain and an input-referred 1-dB compression point of -14.7 dBm. The 94-GHz circuit achieves an upper SSB NF of 17.2 dB at 94 GHz, with 15 dB of conversion gain and an input-referred 1-dB compression point of -10.7 dBm. Both circuits use a bias current of 3.2 mA in the RF mixer core, with total testsite power consumption of 120 mA from a 3-V supply.
The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC)... more The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100% of the center frequency. Successful transmission and reception of an Ultra Wideband pulse that occupies the entire 3.1-10.6 GHz spectrum require an antenna that has linear phase, low dispersion and VSWR ≤ 2 throughout the entire band. Linear phase and low dispersion ensure low values of group delay, which is imperative for transmitting and receiving a pulse with minimal distortion. VSWR ≤ 2 is required for proper impedance matching throughout the band, ensuring at least 90% total power radiation. Compatibility with an integrated circuit also requires an unobtrusive, electrically small design. The focus of this thesis is to develop an antenna for the UWB 3.1-10.6
Abstract A Wideband 77-GHz Front End Receiver for Passive Imaging has been designed and character... more Abstract A Wideband 77-GHz Front End Receiver for Passive Imaging has been designed and characterized. This system comprises a fully differential LNA, double-balanced mixer and VCO. The LNA achieves 4.9-6.0 dB NF, 18-26 dB gain, and S11, S22 of-13.0 and-...
IEEE Transactions on Microwave Theory and Techniques, 2008
Abstract A wideband 77-GHz front-end receiver for passive imaging has been designed and character... more Abstract A wideband 77-GHz front-end receiver for passive imaging has been designed and characterized. This system comprises a fully differential low-noise amplifier (LNA), double-balanced mixer, and voltage-controlled oscillator (VCO). The 77-GHz LNA achieves 4.9-...
A complete 3.1-10.6 GHz ultra-wide band receiver using 500 MHz-wide sub-banded binary phase shift... more A complete 3.1-10.6 GHz ultra-wide band receiver using 500 MHz-wide sub-banded binary phase shift keyed (BPSK) pulses has been specified, designed and integrated as a three chip and planar antenna solution. The system includes a custom designed 3.1-10.6 GHz planar antenna, direct-conversion RF front-end, 500 MS/s analog to digital converters, and a parallelized digital back-end for signal detection and demodulation. A 100 Mb/s wireless link has been established with this chipset. A bit-error-rate (BER) of 10-3 was recorded at -80 dBm at a rate of 100 Mb/s for properly acquired packets in the lowest frequency band. Bit-scaling of the ADC from 1 to 5 bits reveals a 4 dB improvement in the link budget
A pulse-based FCC-compliant ultra-wideband (UWB) transceiver is designed and integrated as a four... more A pulse-based FCC-compliant ultra-wideband (UWB) transceiver is designed and integrated as a four chip and planar antenna solution. The signaling is based on 500 MHz-wide subbanded binary-phase-shift-keyed (BPSK) Gaussian pulses centered in one of 14 bands across the 3.1–10.6 GHz bandwidth. The system includes a UWB planar antenna, a Gaussian BPSK transmitter, a direct-conversion front-end, dual 500 MSps analog-to-digital converters, and a parallelized digital baseband for timing control and data demodulation. The RF local oscillators and baseband gain stages are implemented externally. A 100 Mbps wireless link is established with this chipset. A bit-error rate of 10-3 is observed at a -84 dBm sensitivity. This energy-aware receiver is implemented with strategic hardware hooks such that the quality of service is exchangeable with power consumption.
The paper introduces differential and single ended antenna designs for ultra wideband 3.1-10.6 GH... more The paper introduces differential and single ended antenna designs for ultra wideband 3.1-10.6 GHz communication. The primary design is an ultra thin, low profile differential antenna with an incorporated ground plane for use with a UWB IC receiver. The differential capability eases the design complexity of the RF front-end, and the incorporation of a ground plane enables conformability with small electronic UWB devices. Two single ended designs are also presented for use with a UWB IC transmitter. Both designs result in excellent bandwidth, efficiency, and nearly omnidirectional radiation patterns. Viability of these antennas is tested with a UWB pulse transmitter. Time domain responses are compared to that of a commercial 1-18 GHz double ridged waveguide horn.
The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC)... more The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100 % of the center frequency. Successful transmission and reception of an Ultra Wideband pulse that occupies the entire 3.1-10.6 GHz spectrum require an antenna that has linear phase, low dispersion and VSWR 2 throughout the entire band. Linear phase and low dispersion ensure low values of group delay, which is imperative for transmitting and receiving a pulse with minimal distortion. VSWR 2 is required for proper impedance matching throughout the band, ensuring at least 90 % total power radiation. Compatibility with an integrated circuit also requires an unobtrusive, electrically small design. The focus of this thesis is to develop an antenna fo...
— This paper presents analysis of a digital Ultrawideband (UWB) radio receiver operating in the 3... more — This paper presents analysis of a digital Ultrawideband (UWB) radio receiver operating in the 3.1 GHz to 10.6 GHz band. Analog to digital converter (ADC) bit precision is analyzed on two types of UWB signals- OFDM UWB and pulsed UWB- all in the presence of Additive White Gaussian Noise (AWGN) and a narrowband interferer in the channel. This paper shows how probability of error and the bit resolution of the ADC can be scaled depending on the Signal to Noise Ratio (SNR), Signal to Interference Ratio (SIR), and the type of UWB signal. It also includes considerations on timing recovery for pulsed UWB. I.
Ultra-wideband (UWB) communication is an emerging wireless technology that promises high data rat... more Ultra-wideband (UWB) communication is an emerging wireless technology that promises high data rates over short distances and precise locationing. The large available bandwidth and the constraint of a maximum power spectral density drives a unique set of system challenges. This paper addresses these challenges using two UWB transceivers and a discrete prototype platform. 1. System considerations The use of ultra-wideband signals for communication purposes is approved by the FCC from 3.1 to 10.6 GHz with a maximum effective isotropic radiated power spectral density of-41.3 dBm/MHz. An effective high data rate transceiver in this band should provide robust communication under severe multipath conditions (rms
— A complete 3.1-10.6 GHz ultra-wideband receiver using 500 MHz-wide sub-banded binary phase shif... more — A complete 3.1-10.6 GHz ultra-wideband receiver using 500 MHz-wide sub-banded binary phase shift keyed (BPSK) pulses has been specified, designed and integrated as a three chip and planar antenna solution. The system includes a custom designed 3.1-10.6 GHz planar antenna, direct-conversion RF front-end, 500 MS/s analog to digital converters, and a parallelized digital back-end for signal detection and demodulation. A 100 Mb/s wireless link has been established with this chipset. A bit-error-rate (BER) of 10-3 was recorded at-80 dBm at a rate of 100 Mb/s for properly acquired packets in the lowest frequency band. Bit-scaling of the ADC from 1 to 5 bits reveals a 4 dB improvement in the link budget.
This paper introduces differential and single ended antenna designs for Ultra Wideband 3.1-10.6 G... more This paper introduces differential and single ended antenna designs for Ultra Wideband 3.1-10.6 GHz communication. The primary design is an ultra thin, low profile differential antenna with an incorporated ground plane for use with a UWB IC receiver. The differential capability eases the design complexity of the RF Front-End, and the incorporation of a ground plane enables conformability with small electronic UWB devices. Two single ended designs are also presented for use with a UWB IC transmitter. Both designs result in excellent bandwidth, efficiency, and nearly omnidirectional radiation patterns. Viability of these antennas is tested with a UWB pulse transmitter. Time domain responses are compared to that of a commercial 1-18GHz double ridged waveguide horn.
This article discusses issues associated with high-data-rate pulsed ultra-wideband system design,... more This article discusses issues associated with high-data-rate pulsed ultra-wideband system design, including the baseband processing, transmitter, antenna, receiver, and analog-to-digital conversion. A modular platform is presented that can be used for developing system specifications and prototyping designs. This prototype modulates data with binary phase shift keyed pulses, communicates over a wireless link using UWB antennas and a wideband direct conversion front-end, and samples the received signal for demodulation. Design considerations are introduced for a custom chipset that will operate in the 3.1–10.6 GHz band. The chipset is being designed using the results from the discrete prototype.
The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC)... more The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100% of the center frequency. Successful transmission and reception of an Ultra Wideband pulse that occupies the entire 3.1-10.6 GHz spectrum require an antenna that has linear phase, low dispersion and VSWR ≤ 2 throughout the entire band. Linear phase and low dispersion ensure low values of group delay, which is imperative for transmitting and receiving a pulse with minimal distortion. VSWR ≤ 2 is required for proper impedance matching throughout the band, ensuring at least 90% total power radiation. Compatibility with an integrated circuit also requires an unobtrusive, electrically small design. The focus of this thesis is to develop an antenna for the UWB 3.1-10.6 GHz band that achieves a physically compact, planar profile, sufficient impedance bandwidth, high radiation pattern and near omnidirectional radiation pattern.
Ultra-wideband (UWB) radio is a new wireless technology that was recently approved for commercial... more Ultra-wideband (UWB) radio is a new wireless technology that was recently approved for commercial use by the Federal Communications Commission. Depending on the application, it utilizes bandwidth from DC to 960MHz, or 3.1 to 10.6GHz. Contrary to traditional narrowband, single-tone radio signals, a UWB signal is typically composed of a pulse train of sub-nanosecond pulses modulated either in polarity or position as shown in Figure 1. The narrowness of the pulses in time corresponds to a wide bandwidth in the frequency domain. Since the total power is spread over such a wide swath of frequencies, its power spectral density is extremely low. This minimizes the interference caused to existing services that already use the same spectrum. On account of the large bandwidth used, UWB links are capable of transmitting data over tens of megabits per second. Other benefits include low probability of interference and detection, and precise positioning capability.
Johnna Powell and Anantha Chandrakasan Massachusetts Institute of Technology 50 Vassar St. Rm 38-... more Johnna Powell and Anantha Chandrakasan Massachusetts Institute of Technology 50 Vassar St. Rm 38-107, Cambridge, MA 02139 johnna, anantha@mtl.mit.edu ABSTRACT This paper introduces two antenna designs for Ultra Wideband 3.1-10.6 GHz communication. The primary antenna design is an equiangular spiral slot patch antenna with an outer radius of 2.25 cm. The incorporation of a ground plane enables conformability with small electronic UWB devices. Also, a circular disc monopole is designed and tested. Viability of these antennas is tested with a UWB pulse transmitter. Time domain responses are compared to that of a commercial 1-18GHz double ridged waveguide horn.
The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC)... more The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100% of the center frequency. Successful transmission and reception of an Ultra Wideband pulse that occupies the entire 3.1-10.6 GHz spectrum require an antenna that has linear phase, low dispersion and VSWR 2 throughout the entire band. Linear phase and low dispersion ensure low values of group delay, which is imperative for transmitting and receiving a pulse with minimal distortion. VSWR 2 is required for proper impedance matching throughout the band, ensuring at least 90% total power radiation. Compatibility with an integrated circuit also requires an unobtrusive, electrically small design. The focus of this thesis is to develop an antenna for ...
2006 IEEE Asian Solid-State Circuits Conference, 2006
Double-conversion superheterodyne downconverter blocks operating around 77 GHz and 94 GHz have be... more Double-conversion superheterodyne downconverter blocks operating around 77 GHz and 94 GHz have been realized in 0.13-mum SiGe BiCMOS technology. Both use a single-balanced RF mixer to downconvert the signal to an 8.8 GHz IF, which is amplified and downconverted a second time to baseband. The 77-GHz circuit achieves an upper SSB NF of 12.8 dB at 77 GHz and <12 dB at 76 GHz, with 20 dB of conversion gain and an input-referred 1-dB compression point of -14.7 dBm. The 94-GHz circuit achieves an upper SSB NF of 17.2 dB at 94 GHz, with 15 dB of conversion gain and an input-referred 1-dB compression point of -10.7 dBm. Both circuits use a bias current of 3.2 mA in the RF mixer core, with total testsite power consumption of 120 mA from a 3-V supply.
The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC)... more The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100% of the center frequency. Successful transmission and reception of an Ultra Wideband pulse that occupies the entire 3.1-10.6 GHz spectrum require an antenna that has linear phase, low dispersion and VSWR ≤ 2 throughout the entire band. Linear phase and low dispersion ensure low values of group delay, which is imperative for transmitting and receiving a pulse with minimal distortion. VSWR ≤ 2 is required for proper impedance matching throughout the band, ensuring at least 90% total power radiation. Compatibility with an integrated circuit also requires an unobtrusive, electrically small design. The focus of this thesis is to develop an antenna for the UWB 3.1-10.6
Abstract A Wideband 77-GHz Front End Receiver for Passive Imaging has been designed and character... more Abstract A Wideband 77-GHz Front End Receiver for Passive Imaging has been designed and characterized. This system comprises a fully differential LNA, double-balanced mixer and VCO. The LNA achieves 4.9-6.0 dB NF, 18-26 dB gain, and S11, S22 of-13.0 and-...
IEEE Transactions on Microwave Theory and Techniques, 2008
Abstract A wideband 77-GHz front-end receiver for passive imaging has been designed and character... more Abstract A wideband 77-GHz front-end receiver for passive imaging has been designed and characterized. This system comprises a fully differential low-noise amplifier (LNA), double-balanced mixer, and voltage-controlled oscillator (VCO). The 77-GHz LNA achieves 4.9-...
A complete 3.1-10.6 GHz ultra-wide band receiver using 500 MHz-wide sub-banded binary phase shift... more A complete 3.1-10.6 GHz ultra-wide band receiver using 500 MHz-wide sub-banded binary phase shift keyed (BPSK) pulses has been specified, designed and integrated as a three chip and planar antenna solution. The system includes a custom designed 3.1-10.6 GHz planar antenna, direct-conversion RF front-end, 500 MS/s analog to digital converters, and a parallelized digital back-end for signal detection and demodulation. A 100 Mb/s wireless link has been established with this chipset. A bit-error-rate (BER) of 10-3 was recorded at -80 dBm at a rate of 100 Mb/s for properly acquired packets in the lowest frequency band. Bit-scaling of the ADC from 1 to 5 bits reveals a 4 dB improvement in the link budget
A pulse-based FCC-compliant ultra-wideband (UWB) transceiver is designed and integrated as a four... more A pulse-based FCC-compliant ultra-wideband (UWB) transceiver is designed and integrated as a four chip and planar antenna solution. The signaling is based on 500 MHz-wide subbanded binary-phase-shift-keyed (BPSK) Gaussian pulses centered in one of 14 bands across the 3.1–10.6 GHz bandwidth. The system includes a UWB planar antenna, a Gaussian BPSK transmitter, a direct-conversion front-end, dual 500 MSps analog-to-digital converters, and a parallelized digital baseband for timing control and data demodulation. The RF local oscillators and baseband gain stages are implemented externally. A 100 Mbps wireless link is established with this chipset. A bit-error rate of 10-3 is observed at a -84 dBm sensitivity. This energy-aware receiver is implemented with strategic hardware hooks such that the quality of service is exchangeable with power consumption.
The paper introduces differential and single ended antenna designs for ultra wideband 3.1-10.6 GH... more The paper introduces differential and single ended antenna designs for ultra wideband 3.1-10.6 GHz communication. The primary design is an ultra thin, low profile differential antenna with an incorporated ground plane for use with a UWB IC receiver. The differential capability eases the design complexity of the RF front-end, and the incorporation of a ground plane enables conformability with small electronic UWB devices. Two single ended designs are also presented for use with a UWB IC transmitter. Both designs result in excellent bandwidth, efficiency, and nearly omnidirectional radiation patterns. Viability of these antennas is tested with a UWB pulse transmitter. Time domain responses are compared to that of a commercial 1-18 GHz double ridged waveguide horn.
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