Recent progress in impulse radiating antennas

Farr, Everett G.; Bowen, Leland H.

doi:10.1109/uwbst.2002.1006388

Cited by 2 publications

(2 citation statements)

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“…A directional UWB antenna with higher gain is preferable for enhancing the coverage. The transverse electromagnetic horns [ Farr and Baum , 1998; Kolokotronis et al , 1999; Chung et al , 2000; Lee and Smith , 2004] and impulse radiating antennas [ Farr et al , 1998; Farr and Bowen , 2002] are often used as directional UWB antennas. A log‐periodic dipole antenna, with independent feeding of each dipole, is also investigated for UWB application [ Excell et al , 1999].…”

Section: Introductionmentioning

confidence: 99%

Dual elliptically tapered antipodal slot antenna loaded by curved terminations for ultrawideband applications

2006

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[1] The dual elliptically tapered antipodal slot antenna (DETASA) is a modified version of the antipodal Vivaldi antenna. The DETASA is formed by elliptical tapering of the inner and outer edges of the slotline conductors of the antipodal Vivaldi radiator. To enhance the performance of the DETASA, this paper presents a modified configuration by using curved conducting terminations at the end of the slotline conductors. The proposed DETASA has the advantages of extended lower operating frequency, flatter gain response, symmetrical radiation patterns, and improved impedance matching across the operating band over the conventional DETASA. As an example, a prototype covering the ultrawideband (UWB) frequency range (3.1-10.6 GHz) is designed and characterized in terms of impedance matching, gain, radiation pattern, transfer function, and group delay in the frequency domain, as well as impulse response and fidelity in the time domain. The prototype which is made on a 0.8128 mm Rogers RO4003 substrate with the dimensions of 80 Â 80 mm shows good impedance and radiation performance over 3-20 GHz: Return loss is less than -10 dB; gain variation is less than 4 dB (4-8 dBi); and symmetrical radiation patterns and constant group delay have also been achieved. In the time domain, the prototype features good impulse response and high fidelity (F is more than 0.9) as well. The simulated and measured results show that the proposed DETASA is capable of providing enhanced impedance and radiation performance suitable, in particular, for UWB applications.

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Section: Introductionmentioning

confidence: 99%

Dual elliptically tapered antipodal slot antenna loaded by curved terminations for ultrawideband applications

2006

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“…UWB technology has potentials for applications in communications, radar and location [1,37,39,40,97]. In recent years, R&D efforts have resulted in advances of UWB technology in areas such as antennas [31,52,92,102], power amplifiers [60], timing chips and synchronizers [33,59]. For wireless communications in particular, the applications and hardware that have been developed and demonstrated in the past few years include the following [37,97,109]: (a) For short range operation up to 5 m, data rates up to 600 Mbps are possible within the limits specified in the Code of Federal Regulations for intentional radiators [107] while introducing only negligible interference to coexisting users; (b) At a range of 10 m with an effective average output power of 50 mW, a simplex 2.0 GHz data link can support a data rate of 5 Mbps at less than 10 À8 bit error rate without forward error correction; (c) At a range of 1-2 km, a full duplex 1.5 GHz handheld radio unit provides a data rate of up to 128 kbps with an average output power of 640 mW; (d) At a range beyond 16 km, a full duplex 1.3 GHz radio system has a variable data rate of either 39 kbps or 156 kbps with an average output power of 250 mW.…”

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confidence: 99%

Ultra‐wideband wireless communications

Shen

2003

Wireless Communications

150

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Ultra-wideband (UWB) communication techniques have attracted a great interest in both academia and industry in the past few years for applications in short-range wireless mobile systems. This is due to the potential advantages of UWB transmissions such as low power, high rate, immunity to multipath propagation, less complex transceiver hardware, and low interference. However, tremendous R&D efforts are required to face various technical challenges in developing UWB wireless systems, including UWB channel characterization, transceiver design, coexistence and interworking with other narrowband wireless systems, design of the link and network layers to benefit from UWB transmission characteristics. This paper is to provide an overview of UWB communications, summarize the previous research results, and identify further research issues that need to be tackled. The emphasis is placed on the commercial wireless communications.Ultra-wideband (UWB) transmission is a widely used technology in radar and remote sensing applications [3] and has recently received great attention in both academia and industry for applications in wireless communications [5,37,38,41,75,79,94,97,116,117]. A UWB system is defined as any radio system that has a 10-dB bandwidth larger than 25 percent of its center frequency, or has a 10-dB bandwidth equal to or larger than 1.5 GHz if the center frequency is greater than 6 GHz [32]. The trends that drive recent R&D activities carried out for UWB transmission for commer-cial communication applications include [66]: (a) increasing demand for low-cost portable devices providing high-rate transmission capability at lower power than currently available, (b) lack of available frequencies, and crowding in currently assigned unlicensed frequency bands, (c) increasing availability of wireline high-speed Internet access in enterprises, homes and public places, and (d) decreasing semiconductor cost and power consumption for signal processing. Preliminary results demonstrate that UWB radio is a viable candidate for short-range multiple access communications in dense multipath environments. The preliminary approval of UWB

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Recent progress in impulse radiating antennas

Cited by 2 publications

References 1 publication

Dual elliptically tapered antipodal slot antenna loaded by curved terminations for ultrawideband applications

Dual elliptically tapered antipodal slot antenna loaded by curved terminations for ultrawideband applications

Ultra‐wideband wireless communications

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