Multifeed EBG Dual-Band Antenna for Spatial Mission

Abstract

We present the design of a multibeam reflector antenna fed by a multifeed dual-band electromagnetic band gap (EBG) antenna to achieve a high-gain multispot coverage for space applications. First, we design a dual-band EBG antenna in monofeed configuration. This antenna is composed of double-layer frequency selective surfaces (FSSs) arranged in the longitudinal direction and a square horn as a feed. Then, the same antenna in multifeed configuration is studied, and the results are compared to those obtained in monofeed configuration in order to emphasize the problem of coupling, generally encountered in multifeed configuration. Consequently, filters are used in order to reduce the parasitic interferences and obtain good radiation characteristics. As shown in this paper, the same EBG phase center is obtained in both frequency bands. Finally, we have studied the whole system composed of the offset reflector and the multifeed EBG dual-band antenna. An edge of coverage (EOC) gain higher than 42 dBi and sidelobes levels lower than −18 dBi are obtained over all spots.

Electromagnetic band-gap structured printed antennas: A feature-oriented survey

“…Using this underlying mechanism, the researchers have designed several dual‐band and multi‐band EBG structures for antenna applications . The contributions of these features have been applied for enhancing the performance of the dual‐band, and multiband antennas and these are summarized in this section . The feature classification in this way is also important in modern wireless communication systems.…”

“…Hence, several cases of dual‐band, triple‐band, and multi‐band EBG antennas discussed in this section are further summarized in Table .…”

“…[96][97][98][99] The contributions of these features have been applied for enhancing the performance of the dual-band, and multiband antennas and these are summarized in this section. [100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116][117] The feature classification in this way is also important in modern wireless communication systems. Kuo et al 100 have proposed a dual-band rectangular MSA and enhanced the performance by using unequal periodic PBG ground plane in two orthogonal directions.…”

“…Soliman et al 117 have proposed a multiband/wideband planar inverted-F antenna (PIFA) over an artificial ground plane for wireless communication applications. Hence, several cases of dual-band, triple-band, and multi-band EBG antennas [100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116][117] discussed in this section are further summarized in Table 6.…”

FSS design for dual-band and low profile Fabry-Pérot antenna at Ka-band

“…The fabrication process is less complex than common approaches and less prone to misalignments between any individual layers. The antenna is designed to work at 19.5-20 GHz and 29.5-30 GHz [6]. Unlike common solutions, there is only a single cavity to ensure double-band operation.…”