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Characterization of Wideband Antennas for Point-to-Point Communications

Almoteriy, Mohammed, Sobhy, Mohammed, Batchelor, John C. (2018) Characterization of Wideband Antennas for Point-to-Point Communications. IEEE Transactions on Antennas and Propagation, . ISSN 0018-926X. E-ISSN 1558-2221. (doi:10.1109/TAP.2018.2851367)

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https://doi.org/10.1109/TAP.2018.2851367

Abstract

Antenna frequency response can be characterized in terms of effective aperture and gain. Antennas can also be characterized as a two-port network to ascertain the antenna transfer function (S21). This characterization is important in point-to-point (P2P) communication, as the frequency response can vary due to changes in the radiation pattern in the physical channel. This paper presents a process to investigate the frequency response of a wideband antenna in order to identify the best orientation of the antenna for P2P communication. The process predicts the antenna’s effective aperture and gain for each orientation. An equivalent circuit for the wideband antenna is also derived to obtain the total radiated power. The frequency-variant radiation pattern is ascertained from the S21 phase obtained from the equivalent circuit. For each orientation, the S21 phase is analyzed based on the linear, minimum, and all-pass phase components, which enables the derivation of an equivalent circuit. The variation of group delay for each orientation is also obtained and compared. The measurements between two identical antennas at the two orientations with a free-space channel were then modeled for simulation in a digital system. This simulation predicts the antenna effects for the two orientations used. Finally, this process was validated by using a non-minimum phase monopole ultra-wideband (UWB) antenna.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2018.2851367
Uncontrolled keywords: Ultrawideband antennas, transfer functions, circuit modeling, phase distortion, digital systems
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics (see also: telecommunications) > TK7871.6 Antennas and waveguides > TK7871.67.M53 Microwave antennas
Divisions: Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: John Batchelor
Date Deposited: 26 Jun 2018 10:19 UTC
Last Modified: 09 Jul 2019 11:33 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/67411 (The current URI for this page, for reference purposes)
Batchelor, John C.: https://orcid.org/0000-0002-5139-5765
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