The Puck Antenna: A Compact Design With Wideband, High-Gain Operation

Abstract

We develop a high-gain antenna with wideband operation and compact size by placing a small dielectric superstrate (puck) in front of the feeding antenna. The antenna performance is a combination of the leaky-wave effect, naturally existing in this type of antennas, and the edge diffraction effect occurring at the puck perimeter. Compared to the typical resonant cavity antenna utilizing a large superstrate, the proposed puck antenna has nearly four times enhanced performance (gain-bandwidth combination) while using a square puck of side slightly smaller than two wavelengths (at the design frequency). Further enhancement is achieved by making the puck circular in shape in order to add the diffracted fields in phase. The study is conducted through full-wave simulations and validated through measurements in the Ku band. The effect of puck misalignment is then discussed as a potential practical issue. Last, the ground plane is optimized for maximum antenna performance and relatively acceptable values of aperture efficiency (up to 51%).

Low‐profile wideband Fabry‐Perot resonator antenna using artificial magnetic conductor surface

“…As observed, the PRS size only has minor impacts on the impedance BW but the antenna gain is strongly affected. A smaller value of W prs results in wider gain BW but lower maximum broadside gain due to the PRS edges diffraction . In contrast, higher gain can be obtained with the larger PRS size but the antenna exhibits dual‐band behavior, which results in small gain BW.…”

“…A smaller value of W prs results in wider gain BW but lower maximum broadside gain due to the PRS edges diffraction. 20 In contrast, higher gain can be obtained with the larger PRS size but the antenna exhibits dual-band behavior, which results in small gain BW. Further simulation for different values of W prs indicates that the antenna is able to achieve a very large 3-dB gain BW with a reasonable peak gain of about 14 dBi when W prs is in the range from 35 to 55 mm (~0.9-1.5 λ c ).…”

Low-Cost Ultrawideband High-Gain Compact Resonant Cavity Antenna

“…The permittivity variation is of great interest because it leads to planar geometry that eliminates drawbacks such as aperture shadowing associated with the nonplanar superstrates [12], [13]. Keeping this in mind and taking inspiration from earlier reported work on CRCAs [1], [2], [14], we focused on permittivity-gradient-type superstrates. A superstrate was developed having three concentric rings of electrically different dielectric regions.…”

Compact wideband circularly polarised resonant cavity antenna using a single dielectric superstrate

“…For the case of W prs = 100 mm, most of the electromagnetic energy was concentrated at the centre, and the electric field decreases smoothly from the centre to the edge of the superstrate; whereas it was distributed fairly uniformly over the entire PRS for the smaller PRS size of W prs = 50 mm. Further, the E-field was much stronger at the edges of the smaller PRS than at those of the larger one, and the electromagnetic waves leaking from these edges also significantly affected the antenna's radiation characteristics in terms of the maximum gain and 3 dB gain bandwidth [22]. It can be clearly seen that the large PRS whose edge's diffraction effect was insignificant has a large gain variation profile with the highest values of 15.5 and 14.3 dBic at 6.4 and 8.4 GHz, respectively (Fig.…”