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This paper presents a microstrip antenna with controlled gain and directivity. The gain control of antenna is achieved by employing a Reconfigurable Frequency Selective Surface (RFSS) as superstrate which is formed by 2 × 2 array of square loops. The RFSS resonance is variable and depends on the PIN diodes biasing. When all diodes are in the ON-state, the RFSS resonates at 1.89 GHz, and at 3.00 GHz...
A switchable ultra-wideband (UWB) to tri-band antenna with the presence of the three RF switches is presented. The proposed antenna capable to perform UWB at 2.7GHz to 11.9GHz and tri-band antenna at band 1 (2.43GHz to 2.65GHz), band 2 (3.18GHz to 6.58GHz) and band 3 (7.41GHz to 10.81GHz) under the minimum impedance matching of −10dB. The novel design antenna with a partial ground has a compact size...
Localization and responded accordingly are the most challenging and important issues in reconfigurable microstrip antenna (RMA). Hence, the challenges of combining Radio Frequency Identification (RFID) technology into the RMA are outlined. Integrating RFID into RMA is very important in wireless communication systems since the technologies have the ability to predict exact location of the users. In...
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