Substrate-integrated-waveguide cavity-backed circularly polarized antenna with enhanced bandwidth and gain

Substrate-integrated-waveguide cavity-backed circularly polarized antenna with enhanced bandwidth and gain

Blog Article

We propose a method for increasing the bandwidth of a substrateintegrated-waveguide (SIW) cavity-backed antenna with taper-based microstrip SIW transition feeding.For radio transmission, a circular slot is etched on top of the SIW cavity.For optimal antenna design, the slot is etched slightly away from the cavity center to generate circularly polarized waves.Simulations show a wide axial ratio bandwidth of 7.860% between 11.

02 GHz and 11.806 GHz.Experimental results confirm a Spurs similar wide axial ratio bandwidth of 4.9% between 10.8 GHz and 11.

35 GHz.An SIW feed from an inductive window excites the radiating circular slot, resulting Heart Bracelet Gift Box in a simulated wide impedance range of 1.548 GHz (10.338 GHz-11.886 GHz) and bandwidth of 13.

93%.Experimental results show a wide impedance of 2.08 GHz (10.2 GHz-12.08 GHz) and bandwidth of 18.

84%.The SIW cavity-backed antenna creates a unidirectional pattern, leading to gains of 6.61 dBi and 7.594 dBi in simulations and experiments, respectively.The proposed antenna was fabricated on a Rogers RT/Duroid 5880 substrate, and the reflection coefficient, radiation patterns, and gains were tested and compared using a computer simulator.

The developed broadband antenna seems suitable for X-band applications.