Dual-frequency and broad-band antennas with stacked quarter wavelength elements
- 1 April 1999
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 47 (4), 654-660
- https://doi.org/10.1109/8.768804
Abstract
Original lightweight, low-cost, and compact air-filled planar antennas with short-circuited elements, fed by a coaxial probe, for dual-frequency (S-antenna) and wide-band applications (E-antenna) are investigated. The two-band frequency antenna is formed of two stacked quarter-wavelength elements, short-circuited along diametrically opposed planes. This structure offers two modes with different radiation characteristics. The ratio between the two frequencies can be closely controlled within a range varying from 1.3-2. A bandwidth of 30% for a VSWR <2 is demonstrated using two stacked quarter-wavelength elements short-circuited along the same plane. Numerical simulation results are compared with experiments and a very good agreement is observed. Radiation patterns and input impedance of both structures are measured and the effects of various physical parameters are presented.Keywords
This publication has 15 references indexed in Scilit:
- Single-layer single-patch wideband microstrip antennaElectronics Letters, 1995
- Rigorous analysis of three-dimensional structures incorporating dielectricsIEEE Transactions on Antennas and Propagation, 1994
- New stacked microstrip antenna with large bandwidth and high gainIEE Proceedings - Microwaves, Antennas and Propagation, 1994
- Microstrip patch designs that do not excite surface wavesIEEE Transactions on Antennas and Propagation, 1993
- Improved analysis method for broadband rectangular microstrip antenna geometry using E-plane gap couplingElectronics Letters, 1993
- Multifrequency operation of microstrip antennas using aperture-coupled parallel resonatorsIEEE Transactions on Antennas and Propagation, 1992
- Broad-band gap coupled microstrip antennaIEEE Transactions on Antennas and Propagation, 1990
- An experimental investigation of electrically thick rectangular microstrip antennasIEEE Transactions on Antennas and Propagation, 1986
- Broad-band microstrip antennas using additional resonators gap-coupled to the radiating edgesIEEE Transactions on Antennas and Propagation, 1984
- Microstrip antennas for dual-frequency operationIEEE Transactions on Antennas and Propagation, 1984