Summary
International Symposium on Antennas and Propagation
2010
Session Number:4FB4
Session:
Number:4FB4-3
The Effect of the Mutual Coupling on a Small Reconfigurable Patch Antenna
Hattan F. AbuTarboush, R. Nilavalan,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Patch antennas suffer from narrow bandwidth which can limit their uses in some modern wireless applications, therefore there is an increase in the demand for low profile, easy to manufacture and multiband / wideband antennas which can be easily integrated within communication systems. A variety of studies have come up with different solutions to achieve a wide bandwidth for patch antennas. Some of the techniques employed are: changing the physical size of the antenna; modifying the shape to allow the current path to travel longer which sometime make the antenna large in size; adding additional parts such as multi layers or gaps which also make the antenna large and of a high profile [1]-[3]. A reconfigurable antenna is another solution to achieve wider impedance bandwidth by switching ON and OFF some parts of the antenna. Electronic reconfigurability is usually achieved by incorporating switches, variable capacitors or phase shifters in the topology of the antenna. PIN diodes, varactor diodes, or MEMS switches are the most frequently used components in the design of reconfigurable antennas [4]-[5]. In this paper, A multiband and wideband reconfigurable C-Slot compact patch antenna is proposed. The antenna can operate in a dual-band mode or in a very wideband mode between 5 to 7 GHz. The multiband mode can be obtained at different frequencies when the switches are in the ON OFF state OFF ON state. The wideband mode can be obtained when both patches are radiating (ON ON) with achievable impedance bandwidth of 33.52 %. It is found that the mutual coupling between the patches helped to achieve a wideband when both switches are in the ON state. This will be further elaborated in this paper.