© The Institution of Engineering and Technology
A bandpass frequency selective surface (FSS) with fourth-order bandpass filtering response is proposed based on aperture-coupled patch resonators (ACPRs) under the operation of TM010 and TM030 resonant modes. An initial bandpass ACPRs FSS with second-order filtering response is firstly realised by periodically arranging the back-to-back patch resonators with coupling apertures etched on the common ground. In order to combine the resonant modes TM010 and TM030 for a higher-order filtering response, seven pairs of shorting pins are properly loaded based on the cavity model theory for the microstrip patch resonator. The loaded shorting pins make the TM010 mode of the ACPRs shift towards the higher frequency, while the TM030 mode keeps nearly unchanged. As a result, these two resonant modes can be allocated in proximity to each other to finally realise a fourth-order bandpass filtering response. To validate the design concept, an FSS prototype is designed and fabricated. Reasonable agreement between the measured and simulated results validates the conceptual design.
References
-
-
1)
-
2. Li, B., Huang, X., Zhu, L., et al: ‘Bandpass frequency selective structure with improved out-of-band rejection using stacked single-layer slotlines’, IEEE Trans. Antennas Propag., 2018, 66, (11), pp. 6003–6014, (doi: 10.1109/TAP.2018.2866529).
-
2)
-
5. Pous, R., Pozar, D.M.: ‘A frequency-selective surface using aperture-coupled microstrip patches’, IEEE Trans. Antennas Propag., 1991, 39, (12), pp. 1763–1769, (doi: 10.1109/8.121598).
-
3)
-
6. A-Tamijani, A., Sarabandi, K., Rebeiz, G.M.: ‘Antenna-filter-antenna arrays as a class of bandpass frequency-selective surfaces’, IEEE Trans. Microw. Theory Tech., 2004, 52, (8), pp. 1781–1789, (doi: 10.1109/TMTT.2004.831572).
-
4)
-
7. Liu, N.-W., Zhu, L., Choi, W.-W., et al: ‘A low-profile aperture-coupled microstrip antenna with enhanced bandwidth under dual resonance’, IEEE Trans. Antennas Propag., 2017, 65, (3), pp. 1055–1062, (doi: 10.1109/TAP.2017.2657486).
-
5)
-
1. Munk, B.A.: ‘Frequency selective surfaces: theory and design’ (Wiley, New York, 2000).
-
6)
-
3. Luo, G.Q., Hong, W., Tang, H.J., et al: ‘High performance frequency selective surface using cascading substrate integrated waveguide cavities’, IEEE Microw. Wirel. Compon. Lett., 2006, 16, (12), pp. 648–650, (doi: 10.1109/LMWC.2006.885588).
-
7)
-
4. Sarabandi, K., Behdad, N.: ‘A frequency selective surface with miniaturized elements’, IEEE Trans. Antennas Propag., 2007, 55, (5), pp. 1239–1245, (doi: 10.1109/TAP.2007.895567).
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2020.1910
Related content
content/journals/10.1049/el.2020.1910
pub_keyword,iet_inspecKeyword,pub_concept
6
6