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In this paper we investigate the design and operating principle of a pattern reconfigurable multi-mode slot antenna with a hybrid feed. The slot antenna is excited by an orthogonal arrangement of a co-planar waveguide (CPW) fed circular disc and a microstrip fed square patch. The design objective is to be able to change the direction of the main lo...
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... elements are well matched at the operating frequency of 3.1 GHz with a return loss better than −17dB. The radiation pattern for the individually fed antenna is shown in Figure 3 and 4 for a phase shift at the microstrip fed patch of 90° and 270° respectively. It can be seen that the direction of the main lobe is changed by 90° in the azimuth plane. ...
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Citations
A simple pattern reconfigurable printed inverted-F antenna is presented for WLAN applications. The proposed low profile monopole antenna consists of one main radiator and one parasitic element. The antenna is capable of switching both the pattern and polarization across the full 205 MHz bandwidth, using only one PIN diode. The measured gain for the ON and OFF modes are 1.2 dBi and 4.2 dBi, respectively. The operating mechanism is described, and key antenna parameters are studied and optimized. The envelope correlation coefficient is used to evaluate the switched pattern diversity.
