Spiral Antenna with Reconfigurable HIS using Liquid Crystals for Monopulse Radar Application

Sarah Mohamad; Robert Cahill

doi:10.1109/CAMA.2017.8273476

Spiral Antenna with Reconfigurable HIS using Liquid Crystals for Monopulse Radar Application

Sarah Mohamad, Robert Cahill

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

3 Citations (Scopus)

391 Downloads (Pure)

Abstract

In this paper, the design of an electronically reconfigurable ground plane composed of a high impedance surface (HIS) based on liquid crystals is presented and used as a backing structure for a two-arm Archimedean spiral antenna. The structure is used to provide electronic switching of two different shaped radiation patterns for monopulse radar application; 1) sum-pattern (Σ-pattern), and 2) differencepattern (Δ-pattern). The antenna arrangement is shown to exhibit either the Σ- or the Δ-beam by changing the permittivity (and hence reflection phase) of the HIS reflector when a bias voltage is applied between the periodic array and ground plane. The HIS is demonstrated to resonate at 6 GHz, and numerical results are employed to investigate the performance of the HISbacked spiral arrangement, i.e. radiation pattern, impedance match, realized gain (Σ-pattern), and null depth (Δ-pattern).

Original language	English
Title of host publication	IEEE Conference on Antenna Measurements & Applications (CAMA), 4-6th Dec 2017
Pages	55-58
Number of pages	4
ISBN (Electronic)	978-1-5090-5028-4
DOIs	https://doi.org/10.1109/CAMA.2017.8273476
Publication status	Published - 01 Feb 2018
Event	2017 IEEE Conference on Antenna Measurements & Applications (CAMA) - Ibaraki, Japan Duration: 04 Dec 2017 → 06 Dec 2017 http://www.2017ieeecama.org/

Conference

Conference	2017 IEEE Conference on Antenna Measurements & Applications (CAMA)
Country/Territory	Japan
City	Ibaraki
Period	04/12/2017 → 06/12/2017
Internet address	http://www.2017ieeecama.org/

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10.1109/CAMA.2017.8273476Licence: Unspecified

Spiral Antenna with Reconfigurable HIS using Liquid Crystals for Monopulse Radar Application
© 2017 IEEE. This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 1.14 MBLicence: Unspecified

Cite this

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title = "Spiral Antenna with Reconfigurable HIS using Liquid Crystals for Monopulse Radar Application",

abstract = "In this paper, the design of an electronically reconfigurable ground plane composed of a high impedance surface (HIS) based on liquid crystals is presented and used as a backing structure for a two-arm Archimedean spiral antenna. The structure is used to provide electronic switching of two different shaped radiation patterns for monopulse radar application; 1) sum-pattern (Σ-pattern), and 2) differencepattern (Δ-pattern). The antenna arrangement is shown to exhibit either the Σ- or the Δ-beam by changing the permittivity (and hence reflection phase) of the HIS reflector when a bias voltage is applied between the periodic array and ground plane. The HIS is demonstrated to resonate at 6 GHz, and numerical results are employed to investigate the performance of the HISbacked spiral arrangement, i.e. radiation pattern, impedance match, realized gain (Σ-pattern), and null depth (Δ-pattern). ",

author = "Sarah Mohamad and Robert Cahill",

year = "2018",

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doi = "10.1109/CAMA.2017.8273476",

language = "English",

isbn = "978-1-5090-5029-1",

pages = "55--58",

booktitle = " IEEE Conference on Antenna Measurements & Applications (CAMA), 4-6th Dec 2017",

note = "2017 IEEE Conference on Antenna Measurements & Applications (CAMA) ; Conference date: 04-12-2017 Through 06-12-2017",

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TY - GEN

T1 - Spiral Antenna with Reconfigurable HIS using Liquid Crystals for Monopulse Radar Application

AU - Mohamad, Sarah

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PY - 2018/2/1

Y1 - 2018/2/1

N2 - In this paper, the design of an electronically reconfigurable ground plane composed of a high impedance surface (HIS) based on liquid crystals is presented and used as a backing structure for a two-arm Archimedean spiral antenna. The structure is used to provide electronic switching of two different shaped radiation patterns for monopulse radar application; 1) sum-pattern (Σ-pattern), and 2) differencepattern (Δ-pattern). The antenna arrangement is shown to exhibit either the Σ- or the Δ-beam by changing the permittivity (and hence reflection phase) of the HIS reflector when a bias voltage is applied between the periodic array and ground plane. The HIS is demonstrated to resonate at 6 GHz, and numerical results are employed to investigate the performance of the HISbacked spiral arrangement, i.e. radiation pattern, impedance match, realized gain (Σ-pattern), and null depth (Δ-pattern).

AB - In this paper, the design of an electronically reconfigurable ground plane composed of a high impedance surface (HIS) based on liquid crystals is presented and used as a backing structure for a two-arm Archimedean spiral antenna. The structure is used to provide electronic switching of two different shaped radiation patterns for monopulse radar application; 1) sum-pattern (Σ-pattern), and 2) differencepattern (Δ-pattern). The antenna arrangement is shown to exhibit either the Σ- or the Δ-beam by changing the permittivity (and hence reflection phase) of the HIS reflector when a bias voltage is applied between the periodic array and ground plane. The HIS is demonstrated to resonate at 6 GHz, and numerical results are employed to investigate the performance of the HISbacked spiral arrangement, i.e. radiation pattern, impedance match, realized gain (Σ-pattern), and null depth (Δ-pattern).

U2 - 10.1109/CAMA.2017.8273476

DO - 10.1109/CAMA.2017.8273476

M3 - Conference contribution

SN - 978-1-5090-5029-1

SP - 55

EP - 58

BT - IEEE Conference on Antenna Measurements & Applications (CAMA), 4-6th Dec 2017

T2 - 2017 IEEE Conference on Antenna Measurements & Applications (CAMA)

Y2 - 4 December 2017 through 6 December 2017

ER -

Spiral Antenna with Reconfigurable HIS using Liquid Crystals for Monopulse Radar Application

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