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This paper presents a wire grid polarizer (WGP) working at the frequency ranges between 1 GHz to 500 GHz. The WGP is extensively used in polarization sensitive elements for separating different polarized signals at the same channel. The spacing pitch-to-width ratio should be chosen seriously for lower cross polarization levels in double polarizers. The influences between single and double layers WGP...
A wideband UHF RFID reader antenna with Wilkinson power divider and the composite left and right hand (CRLH) transmission lines is proposed. The antenna is composed of a Wilkinson power divider, CRLH transmission lines, and two open-ended microstrip meander lines. The traditional Wilkinson power divider has a 1/4 wavelength band microstrip transmission line, as transmission line is a narrow band,...
The design of a simple and compact slotted ground plane circularly polarized antenna, is presented. The circular polarized pattern has been achieved through the perturbation of the ring slots and proper optimization of the asymmetry stubs and the slotted ground plane. The antenna is fed by a single microstrip line place beneath the substrate. A better impedance bandwidth of about 1.26GHz is achieved...
A novel planar antenna with broadband and circular polarization characteristics is reported which can be easily fabricated and embedded into RFID readers. Circular polarization radiation is achieved by introducing a cross branch at its corner. And the modified PIFA structure gives the antenna a broadband impedance bandwidth characteristic. For ease in integration with active devices and design facilitation,...
A broadband circular polarized two-element planar inverted-F antenna (PIFA) with pattern diversity and high isolation for multimode satellite navigation is reported. Circular polarization characteristic of the proposed antenna is achieved by introducing a cross branch at its corner of the ground. The modified PIFA structure gives the antenna a broadband impedance bandwidth characteristic. A prototype...
A broadband planar antenna with circular polarization is proposed, fabricated and measured. Circular polarization (CP) radiation of the proposed antenna is achieved by introducing a cross branch at its corner. And the modified PIFA structure gives the antenna a broadband impedance bandwidth characteristic. For ease in integration with active devices and design facilitation, the radiating element and...
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