Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application
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 differen...
| Main Authors: | , |
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| Format: | Proceeding Paper |
| Language: | English English |
| Published: |
Institute of Electrical and Electronics Engineers Inc.
2017
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| Online Access: | http://irep.iium.edu.my/61407/ http://irep.iium.edu.my/61407/1/merged%20-%20CAMA%202017.pdf http://irep.iium.edu.my/61407/7/61407_Spiral%20antenna%20with%20reconfigurable%20HIS%20using%20liquid%20crystals_SCOPUS.pdf |
| _version_ | 1848785668343332864 |
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| author | Mohamad, Sarah Yasmin Cahill, Robert |
| author_facet | Mohamad, Sarah Yasmin Cahill, Robert |
| author_sort | Mohamad, Sarah Yasmin |
| building | IIUM Repository |
| collection | Online Access |
| description | 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) difference pattern (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 HIS-backed spiral arrangement, i.e. radiation pattern, impedance match, realized gain (Σ-pattern), and null depth (Δ-pattern). |
| first_indexed | 2025-11-14T16:56:48Z |
| format | Proceeding Paper |
| id | iium-61407 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-14T16:56:48Z |
| publishDate | 2017 |
| publisher | Institute of Electrical and Electronics Engineers Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-614072018-06-28T08:35:42Z http://irep.iium.edu.my/61407/ Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application Mohamad, Sarah Yasmin Cahill, Robert TK5101 Telecommunication. Including telegraphy, radio, radar, television 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) difference pattern (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 HIS-backed spiral arrangement, i.e. radiation pattern, impedance match, realized gain (Σ-pattern), and null depth (Δ-pattern). Institute of Electrical and Electronics Engineers Inc. 2017-12-04 Proceeding Paper NonPeerReviewed application/pdf en http://irep.iium.edu.my/61407/1/merged%20-%20CAMA%202017.pdf application/pdf en http://irep.iium.edu.my/61407/7/61407_Spiral%20antenna%20with%20reconfigurable%20HIS%20using%20liquid%20crystals_SCOPUS.pdf Mohamad, Sarah Yasmin and Cahill, Robert (2017) Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application. In: The 2017 IEEE International Conference on Antennas and Applications (IEEE CAMA 2017), 4th-6th December 2017, Ibaraki, Japan. http://www.2017ieeecama.org/final-program/ |
| spellingShingle | TK5101 Telecommunication. Including telegraphy, radio, radar, television Mohamad, Sarah Yasmin Cahill, Robert Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application |
| title | Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application |
| title_full | Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application |
| title_fullStr | Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application |
| title_full_unstemmed | Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application |
| title_short | Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application |
| title_sort | spiral antenna with reconfigurable his using liquid crystals for monopulse radar application |
| topic | TK5101 Telecommunication. Including telegraphy, radio, radar, television |
| url | http://irep.iium.edu.my/61407/ http://irep.iium.edu.my/61407/ http://irep.iium.edu.my/61407/1/merged%20-%20CAMA%202017.pdf http://irep.iium.edu.my/61407/7/61407_Spiral%20antenna%20with%20reconfigurable%20HIS%20using%20liquid%20crystals_SCOPUS.pdf |