Filter Synthesis-Based Compact Dual-Band Filtenna for C-Band Applications

A planar compact dual-band filtering antenna based on the filter synthesis technique is proposed in this chapter. The filtering antenna consists of a stub-loaded square loop resonator, a coupled line inverter, and an inverted L antenna. The filtering antenna exhibits a dual-band filtering response with an impedance bandwidth of 4.14% (2.36-2.46 GHz) and 3.85% (3.56-3.70 GHz). To validate the concept, a filtering antenna is fabricated and measured. The simulated and measured result agrees well and indicates that the proposed filtering antenna attributes a compact size of 19 mm × 27 mm, with a gain of 0.77 dBi and-0.08 dBi in the operating range 2.36-2.46 GHz and 3.56-3.70 GHz, respectively. The results indicate that the proposed antenna is a suitable candidate for C-band applications.