Measurement of Radiation Efficiency of Multiport Antennas With Feeding Network Corrections

Raza, Hasan; Yang, Jian; Hussain, Arif

doi:10.1109/lawp.2011.2182594

Cited by 16 publications

(10 citation statements)

References 14 publications

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“…But the results shown in Fig. 15 are only for the Eleven feed with the center puck circuit board, where the measured data are obtained by removing the ohmic loss in the feeding network (the hybrids and combiner), using a rigorous calibration method presented in [29]. The reason for the measured frequency range of only 1.…”

Section: Simulated and Measured Resultsmentioning

confidence: 99%

Design of Compact Dual-Polarized 1.2–10 GHz Eleven Feed for Decade Bandwidth Radio Telescopes

Yang

Pantaleev

Kildal

et al. 2012

IEEE Trans. Antennas Propagat.

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The Eleven antenna is a log-periodic folded-dipolepair array with two unique radiation characteristics: a constant beamwidth and a fixed phase center location over a decade bandwidth. This paper presents a new compact design of a 1.2-10 GHz Eleven antenna, as a feed for reflector antennas by rearranging the geometry of the outermost elements of the antenna. Due to the compact size, it is possible to put the whole feed system inside a compact cryostat and cool it down to cryogenic temperatures, in order to reduce the system noise temperature in radio telescope applications. The new compact Eleven feed has only a 40% volume of the original standard Eleven feed with a very similar performance. This reduces the capacity requirement for the cryogenic cooling system significantly and therefore the power consumption for future radio telescopes, such as the square kilometer array (SKA). The concept behind this compact design is analyzed in the paper. Simulations and measurements presented here have verified the design.

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Section: Simulated and Measured Resultsmentioning

confidence: 99%

Design of Compact Dual-Polarized 1.2–10 GHz Eleven Feed for Decade Bandwidth Radio Telescopes

Yang

Pantaleev

Kildal

et al. 2012

IEEE Trans. Antennas Propagat.

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“…The simulated and measured co-polar directivities in the upper band are shown in The radiation efficiency of the antenna prototype, which is a measure of its ohmic losses, as well as the total radiation efficiency that takes both its ohmic and mismatch losses into account, was measured in a Blue test reverberation chamber [15], where the measurement uncertainty is 0.5 dB [16]. The measured data were obtained by using a rigorous calibration method presented in [17]. It can be observed from Fig.…”

Section: Measured Resultsmentioning

confidence: 99%

A Dual-Band Slotted Trapezoidal Inverted-F Antenna for Indoor Wlan Communications

Pang¹,

Yin²,

Chen³

et al. 2016

PIER Letters

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Abstract-This letter presents a new directional dual-band slotted trapezoidal inverted-F antenna (IFA) for indoor Wireless Local Area Network (WLAN) applications. The dual-band performance can be obtained by tuning the lengths of the inner symmetrical trapezoidal slots and the outer trapezoidal arms in a nearly independent manner. The measured results show that the proposed antenna can provide two separate impedance bandwidths (return loss better than 10 dB) around 180 MHz and 750 MHz for 2.4/5.1-5.8 GHz WLAN bands, respectively. Good radiation performance and roughly constant in-band antenna directivities are also observed.

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“…All ohmic losses are therefore implemented in this model. The measured data are obtained by using a rigorous calibration method presented in [31].…”

Section: Simulated and Measured Resultsmentioning

confidence: 99%

The Circular Eleven Antenna: A New Decade-Bandwidth Feed for Reflector Antennas With High Aperture Efficiency

Yin

Yang

Pantaleev

et al. 2013

IEEE Trans. Antennas Propagat.

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Future ultra-wideband (UWB) radio telescopes require UWB feeds for reflector antennas, and many new UWB feed technologies have gained substantial progress to satisfy the tough specifications for future radio telescope projects, such as the square kilometer array (SKA). It has been noticed that, different from traditional narrow-band horn feeds, all UWB feeds are non-BOR (Body of Revolution) antennas. Therefore, BOR1 efficiency becomes an important characterization for the modern UWB feed technologies. We present a novel circular Eleven feed, constructed of "circularly" curved folded dipoles printed on flat circuit boards, in order to have high BOR1 efficiency at a low manufacture cost. The Genetic Algorithm (GA) optimization scheme has been applied to the design for achieving a low reflection coefficient. Simulated and measured results show that the circular Eleven feed has a reflection coefficient below-6 dB over 1.6-14 GHz and below-10 dB over 78% of the band, and an aperture efficiency higher than 60% over 1-10 GHz and 50% up to 14 GHz.

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Measurement of Radiation Efficiency of Multiport Antennas With Feeding Network Corrections

Cited by 16 publications

References 14 publications

Design of Compact Dual-Polarized 1.2–10 GHz Eleven Feed for Decade Bandwidth Radio Telescopes

Design of Compact Dual-Polarized 1.2–10 GHz Eleven Feed for Decade Bandwidth Radio Telescopes

A Dual-Band Slotted Trapezoidal Inverted-F Antenna for Indoor Wlan Communications

The Circular Eleven Antenna: A New Decade-Bandwidth Feed for Reflector Antennas With High Aperture Efficiency

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