An SIW Pillbox-Based Compact Dual-Polarized Multibeam Antenna With Passive 2-D Beam Scanning Capability

Wideband multibeam mushroom antenna array with low‐temperature cofired ceramic‐integrated pillbox transition for millimetre‐wave applications

“…In addition to the long-slot transition structure, the multi-slot transition scheme is also often used in the design of multibeam pillbox antenna [15,16,20]. Figure 8a gives the part configuration of pillbox system with a multi-slot transition, while the unit model setup of multi-slot transition is shown in Figure 8b.…”

“…The middle section (LTCC layers 5-16) is the PPW power divider, including two layers of PPW. The bottom section (LTCC layers [11][12][13][14][15][16][17][18][19][20][21][22] is the pillbox beamforming layer based on a long-slot transition and a via-hole parabolic reflector. Five SIW feed horns are integrated in the bottom input PPW to provide five beams, and the offset horn are arranged with a slight rotation, and aligned to the centre of reflector for leaving enough room for the test connector.…”

“…These systems constitute a pivotal antenna technology that supports high data transmission rates, increased spectral and energy efficiencies, and flexible beam shaping [2]. There are various beamforming schemes to achieve the multibeam radiation, including Bulter matrix [3][4][5][6], Rotman lens [7][8][9][10], and pillbox reflector [11][12][13][14][15][16][17].…”

“…These systems constitute a pivotal antenna technology that supports high data transmission rates, increased spectral and energy efficiencies, and flexible beam shaping [2]. There are various beamforming schemes to achieve the multibeam radiation, including Bulter matrix [3–6], Rotman lens [7–10], and pillbox reflector [11–17]. Compared with the former, the frequency‐independent characteristics enable the pillbox reflector working within a wide bandwidth [18].…”

Leaky wave antenna loaded complementary elements with dual-stopband suppression

“…However, due to the asymmetry of the elements in the HMSIW, the cross-polarization of the HMSIW LWA is not ideal. Another a way to enhance the scanning range of the LWA is to introduce more SHs in the fast wave region (FWR) [16][17][18][19][20]. In [16], partial upper and lower half-space radiation is achieved by etching quasi-uniform and periodic structures in the SIW upper and lower metal layers operating at n = 0 and n = −1 SHs, respectively.…”