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- Title
Broadband monopulse microstrip antenna array for X-band monopulse tracking.
- Authors
Kumar, Hemant; Kumar, Girish
- Abstract
In this study, a broadband planar multilayer monopulse antenna at the X-band for monopulse tracking applications is presented. A monopulse comparator has been designed using four hybrid ratrace for feeding the radiating elements of the antenna. Each radiating part of the monopulse antenna consists of 4 × 4 electromagnetically coupled microstrip antenna array. To achieve circular geometry as well as better side-lobe level (SLL), a hybrid feeding technique is used in radiating antenna array by adding a few elements in series at the end elements of the parasitic layer of a 4 × 4 corporate fed array. The prototype has been fabricated, tested and measured results are compared with simulated results. The simulated impedance bandwidth for ∣S11 ∣ ≤-10 dB is 21% (8.6-10.6 GHz). A measured peak sum beam gain of 24.4 dBi has been obtained. Measured SLL of <-15 dB has been achieved in both elevation and azimuth planes along with a null depth of <-35 dB for difference patterns in both the planes. The radiation pattern is symmetrical in both the planes with half-power beamwidth nearly equal to 9.0°.
- Subjects
MONOPULSE radar; BROADBAND antennas; MICROSTRIP antenna arrays; ELECTROMAGNETIC coupling; SYMMETRY (Physics)
- Publication
IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2018, Vol 12, Issue 13, p2109
- ISSN
1751-8725
- Publication type
Article
- DOI
10.1049/iet-map.2018.5332