A Dipole Excited Ultrawideband Dielectric Rod Antenna With Reflector

Blech, Marcel D.; Eibert, Thomas F.

doi:10.1109/tap.2007.900261

Cited by 23 publications

(14 citation statements)

References 15 publications

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“…A second identical array is placed, co-polarized and separated by a distance of r=3.0 m in the main beam direction to it. The angular dependent transient response H n (ω, ϑ AU T , φ AU T ) in the frequency domain can be calculated using equation (2) in which H n,mbd (ω) represents the main beam direction and is defined in equation (3).…”

Section: Simulation and Measurement Results In The Frequency Domainmentioning

confidence: 99%

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Ultra broadband dual polarized dipole array with metallic reflector

Hees

Detlefsen

2009

2009 IEEE International Conference on Ultra-Wideband

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An ultrawideband (UWB) dual polarized dipole array with high directivity is presented. It operates in the frequency range from 2.7 GHz up to 8.5 GHz. The dipoles are shaped elliptically and are realized on an rf substrate. The two polarizations were created by four dipoles each. A microstrip to slotline transition feeds every single element. Two four-way Wilkinson divider networks split the power for each polarization which results in the same magnitude and phase at each output port. The remaining dipole in the center of the array is not used and terminated. A metallic reflector is placed 10 mm below the antenna structure to increase the directivity and to lower the backward radiation. With this design, a mean gain of 6.4 dBi and a stable main beam direction with a nearly constant 3 dB beam width, both in the E-and H-plane, were achieved. The antenna shows good time domain behavior with a sharp peak as well as low ringing of the impulse response.

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Section: Simulation and Measurement Results In The Frequency Domainmentioning

confidence: 99%

“…However, sensor applications often require a high directivity and a small size. Although there are some high directive UWB antennas, most of them have the disadvantage of being large in size [2] [3]. Chu [4] and Harrington [5] showed that a high bandwidth results in a low Q value which increases the antenna size.…”

Section: Introductionmentioning

confidence: 99%

Ultra broadband dual polarized dipole array with metallic reflector

Hees

Detlefsen

2009

2009 IEEE International Conference on Ultra-Wideband

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“…The antennas can be divided in two classes: On the one hand a logarithmic periodic dipole antenna (LPDA) which suffers from dispersion and on the other hand antennas for impulse radio applications like the TEM horn or the dielectric rod antenna presented by (M. D. Blech and T. F. Eibert, 2007), which all exhibit an excellent transient behavior, are considered. As depicted in Fig.…”

Section: Transmitter Architecturementioning

confidence: 99%

A reconfigurable software defined ultra-wideband impulse radio transceiver

Blech

Ott

Neumeier³

et al. 2010

Adv. Radio Sci.

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Abstract. An ultra-wideband (UWB) software defined radio (SDR) implementation is presented. The developed impulse radio (IR) transceiver employs first order bandpass (BP) sampling at a conversion frequency which is four times the channel bandwidth. The subsampling architecture directly provides the RF signal avoiding any non-ideal mixer stages and reduces the requirements of digital signal processing implemented in a field programmable gate array (FPGA). The transmitter consists basically of a multi-Nyquist digital to analog converter (DAC), whereas the implemented matched filter (MF) receiver prototype employs a standard digitizing oscilloscope. This design can be adaptively reconfigured in terms of modulation, data rate, and channel equalization. The reconfigurable design is used for an extensive performance analysis of the quadrature phase shift keying (QPSK) modulation scheme investigating the influence of different antennas, amplifiers, narrowband interferers as well as different equalizer lengths. Even for distances up to 7 m in a multipath environment robust communication was achieved.

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“…2) which was developed for the UWB direction of arrival estimation consists of four dielectric rod antennas [10] encircling a monocone antenna [11] enclosed by a dielectric cylinder. Two additional dielectric rod antennas are placed in the corners of the quadratic arrangement to allow TDOA measurements, too.…”

Section: Uwb Antenna Arraymentioning

confidence: 99%

2-dimensional ultra-wideband monopulse based direction finding

Blech

Benzinge

Eibert

2008

2008 IEEE MTT-S International Microwave Symposium Digest

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A novel ultra-wideband (UWB) 2-dimensional angle of arrival (AOA) estimation technique is presented. Using a planar arrangement of one dielectric monocone antenna surrounded by four dielectric rod antennas all exhibiting an almost frequency independent beam pattern in the range of 2-4 GHz, precise 2-dimensional direction finding based on the amplitude monopulse principle is applicable. Thereby an average absolute angular error of 2 • in a range of ±50 • in both ϑ and ϕ is achieved. Using two auxiliary dielectric rod antennas time difference of arrival (TDOA) based direction finding can also be employed, whereas the array dimensions can be kept very compact.

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A Dipole Excited Ultrawideband Dielectric Rod Antenna With Reflector

Cited by 23 publications

References 15 publications

Ultra broadband dual polarized dipole array with metallic reflector

Ultra broadband dual polarized dipole array with metallic reflector

A reconfigurable software defined ultra-wideband impulse radio transceiver

2-dimensional ultra-wideband monopulse based direction finding

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