Aperture field transformation in resonant cavity antennas by transverse permittivity gradient superstrates

Raheel M. Hashmi; Karu P. Esselle

doi:10.23919/URSIGASS.2017.8105235

Aperture field transformation in resonant cavity antennas by transverse permittivity gradient superstrates

Raheel M. Hashmi, Karu P. Esselle

School of Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

Abstract

Single-feed resonant cavity antennas (RCAs) with transverse permittivity gradient (TPG) superstrates exhibit very wideband directivity enhancement. In this paper, we study the transformation of transverse electric field that is achieved by the TPG superstrate. This provides physical insight into the operating principle of such RCAs. Two fictitious apertures are used to record and compare the phase of the field within the cavity of the RCA as well as above its TPG superstrate. It is found that the TPG superstrate significantly reduces the phase variation of the aperture field over most of the operating bandwidth, thus resulting in wideband directive characteristics. Numerical results as well as measurements are presented showing wideband antenna performance with a peak directivity exceeding 16 dBi.

Original language	English
Title of host publication	2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)
Subtitle of host publication	proceedings
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	997-999
Number of pages	3
ISBN (Electronic)	9789082598704
ISBN (Print)	9781509044696
DOIs	https://doi.org/10.23919/URSIGASS.2017.8105235
Publication status	Published - 2017
Event	32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 - Montreal, Canada Duration: 19 Aug 2017 → 26 Aug 2017

Conference

Conference	32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
Country/Territory	Canada
City	Montreal
Period	19/08/17 → 26/08/17

Keywords

antenna feeds
antenna radiation patterns
broadband antennas
cavity resonators
microwave antennas
permittivity
RCA
TPG superstrate
aperture field transformation
single-feed resonant cavity antennas
transverse electric field
transverse permittivity gradient superstrates
wideband antenna performance
wideband directive characteristics
wideband directivity enhancement
Apertures
Broadband antennas
Cavity resonators
Directive antennas
Permittivity
Wideband

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10.23919/URSIGASS.2017.8105235

Cite this

Hashmi, R. M., & Esselle, K. P. (2017). Aperture field transformation in resonant cavity antennas by transverse permittivity gradient superstrates. In 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS): proceedings (pp. 997-999). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.23919/URSIGASS.2017.8105235

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title = "Aperture field transformation in resonant cavity antennas by transverse permittivity gradient superstrates",

abstract = "Single-feed resonant cavity antennas (RCAs) with transverse permittivity gradient (TPG) superstrates exhibit very wideband directivity enhancement. In this paper, we study the transformation of transverse electric field that is achieved by the TPG superstrate. This provides physical insight into the operating principle of such RCAs. Two fictitious apertures are used to record and compare the phase of the field within the cavity of the RCA as well as above its TPG superstrate. It is found that the TPG superstrate significantly reduces the phase variation of the aperture field over most of the operating bandwidth, thus resulting in wideband directive characteristics. Numerical results as well as measurements are presented showing wideband antenna performance with a peak directivity exceeding 16 dBi.",

keywords = "antenna feeds, antenna radiation patterns, broadband antennas, cavity resonators, microwave antennas, permittivity, RCA, TPG superstrate, aperture field transformation, single-feed resonant cavity antennas, transverse electric field, transverse permittivity gradient superstrates, wideband antenna performance, wideband directive characteristics, wideband directivity enhancement, Apertures, Broadband antennas, Cavity resonators, Directive antennas, Permittivity, Wideband",

author = "Hashmi, {Raheel M.} and Esselle, {Karu P.}",

year = "2017",

doi = "10.23919/URSIGASS.2017.8105235",

language = "English",

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booktitle = "2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

address = "United States",

note = "32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 ; Conference date: 19-08-2017 Through 26-08-2017",

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Hashmi, RM & Esselle, KP 2017, Aperture field transformation in resonant cavity antennas by transverse permittivity gradient superstrates. in 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS): proceedings. Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 997-999, 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, Montreal, Canada, 19/08/17. https://doi.org/10.23919/URSIGASS.2017.8105235

Aperture field transformation in resonant cavity antennas by transverse permittivity gradient superstrates. / Hashmi, Raheel M.; Esselle, Karu P.
2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS): proceedings. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2017. p. 997-999.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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AU - Hashmi, Raheel M.

AU - Esselle, Karu P.

PY - 2017

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N2 - Single-feed resonant cavity antennas (RCAs) with transverse permittivity gradient (TPG) superstrates exhibit very wideband directivity enhancement. In this paper, we study the transformation of transverse electric field that is achieved by the TPG superstrate. This provides physical insight into the operating principle of such RCAs. Two fictitious apertures are used to record and compare the phase of the field within the cavity of the RCA as well as above its TPG superstrate. It is found that the TPG superstrate significantly reduces the phase variation of the aperture field over most of the operating bandwidth, thus resulting in wideband directive characteristics. Numerical results as well as measurements are presented showing wideband antenna performance with a peak directivity exceeding 16 dBi.

AB - Single-feed resonant cavity antennas (RCAs) with transverse permittivity gradient (TPG) superstrates exhibit very wideband directivity enhancement. In this paper, we study the transformation of transverse electric field that is achieved by the TPG superstrate. This provides physical insight into the operating principle of such RCAs. Two fictitious apertures are used to record and compare the phase of the field within the cavity of the RCA as well as above its TPG superstrate. It is found that the TPG superstrate significantly reduces the phase variation of the aperture field over most of the operating bandwidth, thus resulting in wideband directive characteristics. Numerical results as well as measurements are presented showing wideband antenna performance with a peak directivity exceeding 16 dBi.

KW - antenna feeds

KW - antenna radiation patterns

KW - broadband antennas

KW - cavity resonators

KW - microwave antennas

KW - permittivity

KW - RCA

KW - TPG superstrate

KW - aperture field transformation

KW - single-feed resonant cavity antennas

KW - transverse electric field

KW - transverse permittivity gradient superstrates

KW - wideband antenna performance

KW - wideband directive characteristics

KW - wideband directivity enhancement

KW - Apertures

KW - Broadband antennas

KW - Cavity resonators

KW - Directive antennas

KW - Permittivity

KW - Wideband

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BT - 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)

PB - Institute of Electrical and Electronics Engineers (IEEE)

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Y2 - 19 August 2017 through 26 August 2017

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Hashmi RM, Esselle KP. Aperture field transformation in resonant cavity antennas by transverse permittivity gradient superstrates. In 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS): proceedings. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE). 2017. p. 997-999 doi: 10.23919/URSIGASS.2017.8105235

Aperture field transformation in resonant cavity antennas by transverse permittivity gradient superstrates

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