Dual-Band Shared Aperture Reflectarray and Patch Antenna Array for S- and Ka-Bands

Abstract

In this communication, a dual-band shared aperture antenna is presented. The proposed antenna achieves dual-band operation by housing both a low-frequency patch antenna array and a high-frequency reflectarray in the same aperture area. The two different antenna types are combined into a single antenna product without any significant performance loss. The antenna has a layered structure that allows the lowfrequency antenna array to have both a sufficient impedance bandwidth and realized gain. The antenna has a shared aperture since the highfrequency reflectarray has unit elements within the area of the lowfrequency patch antenna array. This allows the antenna to achieve a good realized gain in the high-frequency band. The proposed antenna is fabricated and measured. The prototype is designed for S-and Kaband resulting in a frequency-ratio of 7.37. The shared aperture size is 156 mm × 156 mm × 4.624 mm (1.82λ × 1.82λ × 0.05λ at S-band and 13.4λ × 13.4λ × 0.40λ at Ka-band). Measurements show the impedance bandwidth to be 200 MHz (6%) and 5.1 GHz (20%) and the peak realized gain to be 13.70 dBi and 27.65 dBi at 3.5 GHz and 25.8 GHz, respectively A very good agreement between the simulated and measured results is observed.

Efficient Synthesis of Angular Selective Surfaces Based on Accurate Equivalent Circuit Analysis

“…In [21], a multilayer dielectric angular filter is used to suppress grating lobes of a patch antenna array, reducing grating lobes by 15 ∼ 30 dB. Recently, a spatial angular filter based on a single-layer interconnected split-ring-resonators (SRRs) has been proposed in [22], greatly reduced the thickness of the filter compared with other designs [25].…”

A High-Gain Dual-Band Shared-Aperture Array Integrating Zero-Order-Resonance Patch and Higher-Order Metasurface Antenna

“…In addition, shared-aperture arrays with the large frequency ratio and high realized gains have ignited intensive attentions in the past decade. In terms of the dual-band shared-aperture array, many solutions have been reported in literature, such as the stacked designs 9,10 , the co-planar designs 11,12 , and the shared-structure designs [13][14][15] . The last one has advantages of low profile, high structure reuse ratio, and the avoidance of the block effect.…”

Beam widening of rectangular dielectric resonator antenna using anisotropic materials

“…[1][2][3][4][5] Many wireless applications today require a wide beamwidth antenna, for example in satellite communications, to ensure stable communication with the terrestrial receiver, the terrestrial receiver antenna pattern is required to cover the entire upper half space. [6][7][8][9][10] In other applications such as military radar and target tracking systems and automotive radar, wide beamwidth antennas are needed. [11][12][13] Therefore, in these applications, it is necessary to widen the half power beam width (HPBW) of the antenna.…”

“…The DR antenna (DRA) is a good choice for many microwave and millimeter wave applications due to its unique features such as low losses, high impedance bandwidth, compact structure, and ease of excitation 1–5 . Many wireless applications today require a wide beamwidth antenna, for example in satellite communications, to ensure stable communication with the terrestrial receiver, the terrestrial receiver antenna pattern is required to cover the entire upper half space 6–10 . In other applications such as military radar and target tracking systems and automotive radar, wide beamwidth antennas are needed 11–13 .…”