Three-Element Filtering Antenna Array Designed by the Equivalent Circuit Approach

• Published in: IEEE transactions on antennas and propagation Vol. 64; no. 9; pp. 3831 - 3839
• Main Authors: Kufa, Martin, Raida, Zbynek, Mateu, Jordi
• Format: Journal Article Publication
• Language: English
• Published: New York IEEE 01-09-2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenes (Electrònica); Antenes i agrupacions d'antenes; Antenna arrays; Antenna pattern synthesis; Antennas (Electronics); Apertures; Band-pass filters; Capacitance; Digital signal processors; Enginyeria de la telecomunicació; Equivalent circuits; Filtering; Frequency response; Radiocomunicació i exploració electromagnètica; Àrees temàtiques de la UPC
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2016.2586511

This paper introduces a design methodology of a third-order three-element patch array that has no filtering parts and yet behaves like a filtering antenna (filtenna). The design approach includes shaping the frequency response of the reflection coefficient and modeling the frequency response of the normalized realized gain. In order to control the shape of these two responses, g i coefficients of an equivalent low-pass prototype filter are derived for designing the third-order filtering antenna array. The design methodology was verified over the frequency band from 4.8 to 6.8 GHz for levels of the reflection coefficient from -10 to -20 dB and for fractional bandwidths from 7% to 14%. The whole design methodology was supported by manufacturing and measuring three third-order filtering antenna arrays designed with different configurations. The simulated and measured results show good agreement in all cases.