A beam‐switchable low‐profile antenna based on substrate integrated waveguide

Abstract

In order to improve the communication quality in mobile applications, a low profile pattern reconfigurable printed patch antenna is designed. The design of the radiating structure is based on the study of the field distribution of the quarter mode substrate integrated waveguide. The proposed antenna is fed by four coaxial feed ports. Compared with the most patch antennas that only produce axial beam patterns, the proposed antennas can generate different beams by simply changing the excitation methods. The antenna can generate a total of 12 beams to meet the needs of different application scenarios conveniently. In addition, isolation between ports is improved by introducing SRR and CSRR structures. Simulation and measurement results show good agreement, the antenna can obtain stable gain of more than 5dBi in the direction of the main beam. The antenna is designed to operate at 2.45 GHz. It has a height of 1.5 mm, so its profile is low.

A wideband planar pattern reconfigurable antenna for IEEE 802.11ac WLAN applications

“…17,18 (4) Antenna array fed through multiple ports. [19][20][21] Pattern reconfiguration is obtained by choosing the excitation of each feeding port. ( 5) Substrate-integrated waveguide (SIW) antenna with radiative metasurface.…”

“…Pattern reconfiguration is obtained by controlling the connection of parasitic patches with the direct‐fed patch 16 or the shape of parasitic patch 17,18 . (4) Antenna array fed through multiple ports 19–21 . Pattern reconfiguration is obtained by choosing the excitation of each feeding port.…”

A pattern reconfigurable design based on a slotted patch antenna with two feed ports

“…For such a pattern reconfigurable design method, it is difficult to yield tilted beams. The reconfigurable antenna designs using multiple radiating elements are relatively easy to generate steerable tilted beams 4–6 . A typical design is described in Reference 4, where a corresponding tilted beam is generated when one of four radiating elements is activated.…”

Dual‐functional QM SIW cavity integrating two‐element MIMO antenna and second‐order bandpass filter

“…Over the years, some excellent antennas and filters have been reported in the literature. Frequency‐tunable, 6 circularly polarized, 7 beam‐switchable, 8 and two‐element multiple‐input‐multiple‐output (MIMO) 9 antennas based on QM SIW cavities have been proposed. On the other hand, second‐order, 10 dual‐band, 11 and wideband 12,13 bandpass filters have also been investigated.…”