Reconfigurable Circular Microstrip Patch Antenna with Polarization Diversity
Single-feed circular microstrip patch antenna with diagonal slot for polarization reconfigurability has been proposed. PIN diode can be used to achieve reconfigurability by placing it within the slot. Ideal diode that is diode size patch is considered in
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Abstract Single-feed circular microstrip patch antenna with diagonal slot for polarization reconfigurability has been proposed. PIN diode can be used to achieve reconfigurability by placing it within the slot. Ideal diode that is diode size patch is considered in place of PIN diode for simulation and fabrication purpose. When diode is ‘ON’ and ‘OFF’, an antenna can switch between linear and circular polarization, respectively. Keywords Reconfigurable circular microstrip patch Linear polarization PIN diode
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1 Introduction Reconfigurable microstrip antennas due to their properties of adapting to change in environmental and system requirements is motivated a tendency to employ it in recent years [1]. For different wireless communication applications, different frequency bands with different types of radiation and polarization characteristics are required. Conventionally, this can be achieved by designing different antennas. However, practically the physical size of the system does not permit designing separate antennas for each application. Therefore, the design of reconfigurable antennas, which could integrate various operating characteristics in a single antenna, has opened an innovative research area for antenna researchers and engineers. It is well known that microstrip antennas can generate circular polarization (CP) radiation when two fundamental modes with orthogonal property are excited with the same amplitude and a phase difference of 90 [2]. For a single-fed P.P. Vast (✉) ⋅ S.D. Apte Electronics Engineering Department, Rajarshi Shahu College of Engineering Tathwade, Pune, India e-mail: [email protected] S.D. Apte e-mail: [email protected] © Springer Science+Business Media Singapore 2017 S.C. Satapathy et al. (eds.), Proceedings of the International Conference on Data Engineering and Communication Technology, Advances in Intelligent Systems and Computing 469, DOI 10.1007/978-981-10-1678-3_37
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microstrip antenna, the condition can be achieved by introducing perturbation segments into the antenna structure. With the perturbation segments, the original fundamental mode of the antenna is split into two orthogonal modes, which have different resonant frequencies, and one CP operating frequency can be found between the two resonant frequencies. Several antenna structures offering polarization diversity have been proposed in the literature. Single-feed Square Microstrip patch antenna with single notch for polarization reconfigurability has been proposed [3]. Reconfigurability can be achieved by placing PIN diode within the notch. Four identical notches with parasitic elements are embedded into the circular patch antenna [4]. The antenna can switch between linear polarization (LP), left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP). PIN diodes are used to, respectively, reconfigure the coupling slot and the open stub of the feed line, the polarization of the microstrip antenna can be switched between vertical and horizo
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