Reconfigurable slot-coupled microstrip antenna with polarisation diversity
- 1 January 2007
- journal article
- Published by Institution of Engineering and Technology (IET) in IET Microwaves, Antennas & Propagation
- Vol. 1 (3), 798-802
- https://doi.org/10.1049/iet-map:20060184
Abstract
The design of an aperture-coupled microstrip patch antenna whose radiation can be switched between circular polarisation (CP) and linear polarisation (LP) states is presented. For the proposed design, the CP and LP radiations are excited through the couplings of a ring slot and an open-ring slot in the ground plane, respectively. The effects of the key parameters of the proposed design on the CP and LP performances are investigated in details. A prototype that uses a pin diode to reconfigure the coupling slot is implemented and tested. From the obtained results, the prototype has a cross polarisation level of more than 25 dB when it is operated at the LP state and an axial ratio of less than 3 dB when it is operated at the CP state. Moreover, the two states share a 10 dB input impedance bandwidth. Consequently, the proposed reconfigurable microstrip antenna has the feature of polarisation diversity at a fixed frequency band.Keywords
This publication has 9 references indexed in Scilit:
- Reconfigurable microstrip‐patch antenna with frequency and polarization‐diversity functionsMicrowave and Optical Technology Letters, 2005
- Design of aperture-coupled annular-ring microstrip antennas for circular polarizationIEEE Transactions on Antennas and Propagation, 2005
- Broadband patch antenna with ring slot couplingElectronics Letters, 2004
- A reconfigurable slot antenna with switchable polarizationIEEE Microwave and Wireless Components Letters, 2003
- Understanding and measuring circular polarizationIEEE Transactions on Education, 2003
- Broadband dual-polarized patch antennas fed by capacitively coupled feed and slot-coupled feedIEEE Transactions on Antennas and Propagation, 2002
- A reconfigurable patch antenna using switchable slots for circular polarization diversityIEEE Microwave and Wireless Components Letters, 2002
- Transmission line model for field distribution in microstrip line fed H-slotsElectronics Letters, 2001
- Performance of a cross-aperture coupled single feed circularly polarised patch antennaElectronics Letters, 1996