Abstract
A two-port reconfigurable passive radiator with pattern switching capability and its application in designing of oscillating feedback loop active integrated antenna (AIA) is reported in this paper. Passive radiator consists of two element array of microstrip patch, fed by electromagnetically coupled T-shaped microstrip line. Proposed structure contains feed port (port 1) and coupled port (port 2). Proposed antenna is capable to switch the beam among sum and difference pattern by turning PIN diodes ON or OFF. As an application, oscillating feedback loop active integrated antenna (AIA) is designed by connecting this two-port passive radiator in the feedback path. Two-port passive radiator is fabricated and tested. Measured results are reported and compared with the simulated results. Proposed AIA design is simple and easy to fabricate can be used as a fixed frequency generator and key element for power combining arrays.
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