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- Title
Miniaturisation of switched beam array antenna using phase delay properties of CSRR-loaded transmission line.
- Authors
Rao, Patnam H.; Sajin, Jaykumari Sajeevan; Kudesia, Kushal
- Abstract
The application of phase delay property of complementary split-ring resonator (CSRR)-loaded transmission line in the miniaturisation of Butler matrix beam forming network is proposed. The design of left-handed transmission line and the influence of the capacitive stubs in the phase delay properties of the CSRR-loaded transmission line with a gap are presented. The CSRR-loaded transmission line with a 7 mm capacitive stub provides 93' more phase delay than the CSRR-loaded transmission line without the stubs. CSRR-loaded transmission line with capacitive stubs is applied to the phase compensating lines of 4×4 Butler matrix configurations, without disturbing the 90' hybrids and crossovers. The CSRR-loaded configuration exhibits a size reduction of 48% of the footprint of the conventional Butler matrix. The output of the miniaturised Butler matrix is connected to a linear microstrip antenna array of four radiating elements and its radiation parameters (beam pointing direction, beamwidth and sidelobe levels) are compared with that of an unloaded conventional 4×4 Butler matrix. The miniaturised switched beam-steering antenna exhibits similar radiation characteristics as that of a conventional switched beam antenna.
- Subjects
ANTENNA arrays; ELECTRIC lines; METAMATERIAL antennas; MINIATURE electronic equipment; INFORMATION technology
- Publication
IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2018, Vol 12, Issue 12, p1960
- ISSN
1751-8725
- Publication type
Article
- DOI
10.1049/iet-map.2017.0978