Main Article Content
A two-function filtering antenna device in the 1-2 GHz band is investigated. The device radiates or receives electromagnetic waves of circular polarization and simultaneously performs the function of a second-order bandpass filter. The considered design consists of a dual-mode printed antenna-resonator coupled with two non-radiating resonators which are fed by a quadrature balanced power divider. Using the model in the form of an equivalent circuit the main features of the structure synthesis and its tuning are analyzed including potentially achievable characteristics. The results of the numerical simulations using electromagnetic software are presented in comparison with the experimental characteristics for the prototype made of high-permittivity high-quality ceramics. It is found that the proposed design is characterized by an almost two-fold increase of the operating frequency band compared to the resonant antenna itself while maintaining a low level of cross-polarization within the passband. It is also shown that the design has the frequency response of the second-order bandpass filter.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
- L. J. Chu, Physical limitations of omnidirectional antennas, Journal of Applied Physics 19 (1948), pp.1163-1175.
- G. Mattaei, L. Young and E.M.T. Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Narwood, 1980.
- J. Zuo, X. Chen, G. Han, L. Li, and W. Zhang, An Integrated Approach to RF Antenna-Filter Co-Design, IEEE Antennas Wireless Propag Lett 8 (2009), pp.141-144.
- J. Jadhav, P. Deore, Filtering antenna with radiation and filtering functions for wireless applications, Journal of Electrical Systems and Information Technology 4 (2017), pp.125-134.
- S. Chen, Y. Zhao, M. Peng and Y. Wang, A Codesigned compact dual-band filtering antenna with PIN loaded for WLAN applications, International Journal of Antennas and Propag., (2014).
- M. Sabran, S. Rahim, C. Leow, P. Soh, B. Chew, and G. Vandenbosch, Compact circularly polarized truncated square ring slot antenna with suppressed higher resonances, PLOS ONE 2 (2017).
- M.K. Alkhafaji, R.K.Z. Sahbudin, A.B. Ismail and S.J. Hashim, Design of a selective filter-antenna with low insertion loss and high suppression stopband for WiMAX applications, International Journal of Sensor Networks and Data Communications, 2016.
- W. J. Wu, Y. Z. Yin, J. J. Xie, X. S. Ren, S. L. Zuo, Low-cost microstrip antenna with a monopole-like radiation pattern for RF front end, Microwave Opt. Technol. Lett. 54 (2012), pp.1810-1814.
- W. J. Wu, Y. Z. Yin, S. L. Zuo, Z.Y. Zhang, and J. J. Xie, A new compact filter-antenna for modern wireless communication systems, IEEE Antennas Wireless Propag. Lett. 10 (2011), pp.1131-1134.
- M. Qu, M. Li, L. Yao, M. Rao, S. Li, L. Deng, A novel circularly polarized filtering antenna with high out-of-band radiation rejection level, Microwave Opt. Technol. Lett. 60 (2018), pp.134-140.
- US patent 8,836,596 B2, Sep. 16, 2014.
- RF patent 2448396, Apr. 20, 2012.
- K. L. Wong, Compact and Broadband Microstrip Antennas, John Wiley & Sons Inc., New York, 2002.