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Article: A tunable L-band circular microstrip patch antenna.
- Article from:
- Microwave Journal
- Article date:
- October 1, 1993
- Author:
CopyrightCOPYRIGHT 1993 Horizon House Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Introduction
Microstrip patch antennas, shown in Figure 1, possess many desirable features, including light weight, low cost and conformability, which makes them suitable for a wide variety of applications at microwave frequencies. Typically, a microstrip antenna possesses an impedance bandwidth of not more than 4 percent. This narrow impedance bandwidth is advantageous because of the lower system noise due to reduction in KTB noise and improved adjacent channel rejection without additional filtering in the receiver's front end.
However, narrow bandwidth is also a limitation. Microwave bands typically have much wider channel assignments associated with them, ...