A Tunable Dual-Fed Self-Diplexing Patch Antenna
- 29 March 2017
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 65 (6), 2874-2879
- https://doi.org/10.1109/tap.2017.2689035
Abstract
We propose a simple and compact design of a tunable self-diplexing patch antenna. Two U-shapes are etched on the same platform to locate the radiating patches which are excited separately using two feed ports. Metalized vias acting like metal walls are applied to reduce the antenna footprint, and to avoid coupling effects when the frequency ratio (fr) approaches 2. The tuning process is achieved by using two varactors properly inserted into the radiating structure. The operating frequencies can be tuned independently with high isolation level. Simulation and measurement results are quite consistent. Measured results show that the lower frequency band ranges from 3.9 to 4.37 GHz with measured peak gain and efficiency of 3.82 dBi-65%, while the upper band ranges from 4.63 to 5.34 GHz with peak gain of 4.48 dBi and peak efficiency of 64%. The self-diplexing antenna achieves an isolation level better than 22 and 32 dB for the lowest fr of 1.05, and the highest fr of 1.37, respectively. The radiation pattern is unidirectional and extremely stable during the frequency tuning of both bands.Funding Information
- National Natural Science Foundation of China (61571084, 61561021)
- Program for New Century Excellent Talents in University (NCET-13-0095)
- FRF for CU (ZYGX2014J016)
- SRF for ROCS, SEM
This publication has 15 references indexed in Scilit:
- Design of Self-Diplexing Substrate Integrated Waveguide Cavity-Backed Slot AntennaIEEE Antennas and Wireless Propagation Letters, 2016
- A 1.4–2.3-GHz Tunable Diplexer Based on Reconfigurable Matching NetworksIEEE Transactions on Microwave Theory and Techniques, 2015
- Three-Pole 1.3–2.4-GHz Diplexer and 1.1–2.45-GHz Dual-Band Filter With Common Resonator Topology and Flexible Tuning CapabilitiesIEEE Transactions on Microwave Theory and Techniques, 2013
- A Mode-Based Design Method for Dual-Band and Self-Diplexing Antennas Using Double T-Stubs Loaded ApertureIEEE Transactions on Antennas and Propagation, 2012
- MULTIFREQUENCY SELF-DIPLEXED SINGLE PATCH ANTENNAS LOADED WITH SPLIT RING RESONATORSProgress In Electromagnetics Research, 2011
- A Dual-Fed, Self-Diplexing PIFA and RF Front-EndIEEE Transactions on Antennas and Propagation, 2007
- Self-diplexing stacked patch antenna for satellite mode handset systemPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Isolation enhancement of PBG microstrip diplexer patch antennaPublished by Institution of Engineering and Technology (IET) ,2001
- Dual frequency multilayered circular patch antenna with self-diplexing functionElectronics Letters, 1995
- Feed circuits of double-layered self-diplexing antenna for mobile satellite communicationsIEEE Transactions on Antennas and Propagation, 1992