Microwave and Optical Technology Letters · 2015 · 15 citations · 9 references
EngineeringElectrical EngineeringAntennasMicrowave EngineeringWireless CommunicationsAntenna DesignMicrostrip AntennasMicrowave AntennasMicrowave FiltersPlanar AntennasSlot AntennasAntenna Impedance BandwidthFilteringFractional BandwidthImpedance BandwidthMicrostrip Slot AntennasParasitic ElementsPin DiodesUltra-wideband Antennas
ABSTRACT A new design of microstrip slot antenna with switchable single and dual band filtering functions for ultrawideband (UWB) applications is presented in this letter. To create filtering quality, in the proposed structure radiating patch is modified embedding two T‐shaped stubs into the radiating patch and also using coupling parasitic element on the ground plane. The measured impedance bandwidth for VSWR <2 is spread in frequency range of 3–16.9 GHz with a fractional bandwidth of 139.7% while filtering the interference with C‐band and wireless local area network systems at 3.4–4.28 GHz and 5.21–6.36 GHz, respectively. Introducing PIN diodes switches to the antenna structure has added an additional merit to the antenna performance which is switchable single/dual band filtering operation. The designed antenna has a simple structure with a very small size of 20 × 20 mm 2 while presenting consistent almost omnidirectional radiation characteristics at its vast frequency range of operation. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2946–2950, 2015
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