Dual‐band stacked patch antenna with wide e‐plane beam width and stable gain at both bands

Abstract

A dual‐resonant, semi‐circular sector patch antenna is properly incorporated to a planar self‐balanced magnetic dipole antenna and lead to a novel triple‐resonant, dual‐band planar antenna which has characteristics of wide E‐plane beam width and stable gain at both bands in this work. Design approach with a group of approximate closed‐form formulas is proposed to initially calculate value of the main parameters of the antenna. In the numerical and experimental verifications, it is demonstrated that the antenna operates at 2.4–2.48 and 4.75–5.95 GHz for reflection coefficient smaller than −10 dB. The antenna exhibits unique characteristics of wide E‐plane half‐power beamwidths of 91°/115°, and stable in‐band average gain of about 4–5 dBi at both bands owing to the nearly complementary frequency dispersive characteristic of the radiation pattern in both principal‐cut planes. As seen, the antenna can cover wide wireless communication spectra, which makes it promising to get applications in future developments of multi‐functional WLAN/RFID antennas, C2C communication antennas, and light‐weight, compact UAV antennas without bulky reflectors.

Analysis and Design of a High Gain Multiband Antenna Based on Metamaterials for RFID Applications

“…The antenna presented in this paper has a higher gain in certain frequency bands, especially in the UHF band, reaching up to 7 dB, which emphasizes the superiority of our design in this aspect. Moreover, the antennas in references [10,14,26] operate on two bands and have miniaturized size but are inadequate compared to our proposed design. This comparison shows that our antenna can cover more bands than the other designs.…”

“…Table 5 contains a detailed comparison of the proposed antenna with other recent multiband antennas for similar applications. When evaluating the performance, it is noticeable that the gain of the microstrip antennas in the UHF band is at most 6 dB [11][12][13][14][15][16]. Unfortunately, this is not an excellent result, as it can lead to losses in network coverage, especially for RFID, which limits their practical application.…”

“…This comparison shows that our antenna can cover more bands than the other designs. Importantly, the proposed antenna utilizes a simple geometry with a single probe feed, eliminating the need for a complex structure and multilayer substrate as called for in references [11,14]. This design promotes low weight, low profile, and low fabrication cost due to the planar structure, which is a clear advantage of the proposed antenna.…”

“…In [11], a three-port triband antenna with slot-coupled feed technique on three-layer substrates for radio frequency identification (RFID) is presented. Similarly, multiband patch antennas with feed technique implemented on twolayer substrates [12][13][14] and three-layer substrates [15] are proposed for wireless applications. An increase in bandwidth could be achieved together with a gain.…”

Design and analysis of broadband circularly polarized compact planar antennas for 2.45 GHz RFID handheld reader applications

“…The Meandered-loop technique was used to miniaturize the size of the antenna in [13]. Furthermore, the authors in [14] used a planar self-balanced magnetic dipole technique and the authors in [15] described a planar inverted-F antenna technique to achieve RFID application band. A concept of the meander strip line in [16] is used to improve axial ratio bandwidth.…”