Wideband Microstrip Leaky-Wave Antennas With Two Symmetrical Side Beams for Simultaneous Dual-Beam Scanning
PROJECT TITLE :
Wideband microstrip leaky-wave antennas (LWAs) that radiate two symmetrical facet beams are described. The 2 beams are steered simultaneously by sweeping the operating frequency. To achieve this, the second higher order mode of the microstrip is happy. Two electrical field nulls are created between the microstrip and the ground plane using via arrays to suppress lower order modes. To check the concept, one amongst the antenna designs was prototyped. The prototyped antenna is capable of steering two symmetrical beams among a range of thirty seven° when frequency is swept between half-dozen.ninety two and 8.75 GHz. The measured peak gain of the antenna is 12.7 dBi and the variation of gain from half dozen.ninety two to eight.seventy five GHz is three.one dB. The measured ten-dB come loss bandwidth is 23%, that is terribly giant for a dual-beam microstrip LWA. Such a wide impedance bandwidth is important to achieve beam scanning over a wide angular range by sweeping frequency. Another advantage is that this single-layer antenna is easy to fabricate.
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