Thickness Reduction and Performance Enhancement of Steerable Square Loop Antenna Using Hybrid High Impedance Surface

Minimized Low-Profile Wideband Antennas Using High Impedance Surface

“…Therefore, the pseudo-PMC effect of HIS is defined as bandgap range of 0 ∘ ± 90 ∘ . Using HIS as a reflector, a lot of low-profile antennas have been reported [11][12][13][14][15][16]. A planar folded dipole on via-less dog bone-shaped HIS array is presented in [11], achieving a measured impedance bandwidth of 6% and a boresight gain of 6.4 dBi.…”

Dual-Band Low-Profile Capacitively Coupled Beam-Steerable Square-Loop Antenna

“…These artificial surfaces allow the antenna to be placed in a very close proximity to the ground plane as the image of the antenna current in HIS and PMC surfaces is in-phase with the actual antenna current and the radiated fields add-up in space. Further, Hybrid High Impedance Surface (HHIS) [12] has been reported for thickness reduction of beam steerable SLA. The HHIS reduces the height of SLA from λ 0 /4 [9] to λ 0 /13.7 [12].…”

“…Further, Hybrid High Impedance Surface (HHIS) [12] has been reported for thickness reduction of beam steerable SLA. The HHIS reduces the height of SLA from λ 0 /4 [9] to λ 0 /13.7 [12]. However, the SLAs using HHIS surfaces uses numerous vias which can make them bulky and heavy, and more complex to manufacture.…”

“…Compared to [12] the CCSLA achieves a 47% reduction in substrate thickness without using any band gap structure. Hence, the structure of CCSLA is lighter in weight, cheaper and simpler to fabricate.…”

Reconfigurable Beam-Steering Antenna Using Dipole and Loop Combined Structure for Wearable Applications

“…It is capable of more strongly transmitting and receiving signals in the desired direction and preventing interference with other signals. Beam-steering antennas are mostly classified into adaptive array antenna using the phase shifter or single reconfigurable antenna using the switches [4]- [6]. The adaptive array antenna is used as the most common type of steerable antenna system and offers better gain than the single reconfigurable antenna.…”