Design, analysis, and modeling of miniaturized multi-band patch arrays using mushroom-type electromagnetic band gap structures

In this paper, the application of the L‐slotted mushroom electromagnetic bandgap (LMEBG) structure to patch antenna and antenna array is investigated. A coaxial fed patch antenna and antenna array are designed at 5.8 GHz, center frequency for ISM band (5.725‐5.875 GHz). Two layers of LMEBG are placed around the patch to achieve a gain enhancement of 1.9 dB. Measured results show a bandwidth enhancement of 300 MHz with an additional resonant frequency at 5.6 GHz with 4.5 dB of gain. A 5 × 2 array of LMEBG is used to achieve a 2 dB mutual coupling reduction and 2 dB gain enhancement for a two‐element H‐coupled patch antenna array.

Section: Modeling Of Patch Antenna With Lmebgmentioning

confidence: 99%

Gain and isolation enhancement of patch antenna using L‐slotted mushroom electromagnetic bandgap

Venkata

Kumari

2020

“…1,2 Various designs have been proposed in the kinds of literature to reduce the size of microstrip patch antennas. [3][4][5][6][7][8] A meandered patch or ground plane is presented in. 3 In such schemes, creating the slots into the patch and ground plane lengthen the current path and reduce the operating frequency.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth and gain improvement for reduced size of stacked microstrip antenna fed by folded triangular patch with half V‐shaped slot

Malekpoor

Hamidkhani

2021

Self Cite

This study presents a new stacked design of reduced size broadband microstrip patch antenna for ultra-wideband (UWB) operation. A folded triangular patch's feeding technique, half V-shaped slot and shorting pins are employed to design the proposed stacked antenna. Shorting pins are applied at the edge of structure to miniaturize the size of the patch. The proposed design with the half V-shaped slot and without stacked patch provides the measured impedance bandwidth (S 11 <−10 dB) of 115.7% (4.35-16.3 GHz) for broadband application. In the proposed design with the half V-shaped slot, the wide bandwidth with an acceptable size reduction is achieved. By adding a stacked element on the upper patch, the impedance bandwidth of the proposed antenna is improved from 3.47 to 17.35 GHz. The stacked design includes a measured impedance bandwidth of 133.3% with reduced sizes of more than 78% compared to the corresponding full design and an enhanced maximum gain of 6.2 dBi. The obtained radiation and impedance results show that the proposed design is applicable for wideband operation. Besides, the effects of some basic concepts and surface currents on the suggested structure are investigated to explain their broadband performance.

“…EBGs performance is defined and analyzed on the basis of the photonic band gap surfaces in periodic structures . Due to the distinct and appealing features, EBG structures are utilized at different applications . Based on the electromagnetic theories, it is well known that the image current of a perfect magnetic conductor (PMC) is in parallel and in‐phase with the original current.…”

Section: Introductionmentioning

confidence: 99%

“…1 Due to the distinct and appealing features, EBG structures are utilized at different applications. [2][3][4][5][6] Based on the electromagnetic theories, it is well known that the image current of a perfect magnetic conductor (PMC) is in parallel and in-phase with the original current. Artificial magnetic conductor (AMC) surfaces act as a PMC with in-phase reflection coefficient over the given frequency band.…”

Section: Introductionmentioning

confidence: 99%

Comparative investigation of reflection and band gap properties of finite periodic wideband artificial magnetic conductor surfaces for microwave circuits applications in X‐band

Malekpoor

2019

Self Cite

In this study, novel designs of artificial magnetic conductors (AMCs) for wideband operation are introduced. By using two techniques of the planar parasitic patches and stacked elements, AMC unit cells are achieved. The first design of the AMC unit cell is composed of four symmetric patches with two arms, which are coupled to a rhombic patch at the center. The second AMC design is configured of two stacked patches, which are connected together through the air spacing. The first and second AMC designs operate at the frequencies of 10.15 and 10.65 GHz with ±90° reflection phase bandwidths of 8 to 12.38 GHz (43.15%) and 8 to 12.90 GHz (46%), respectively, for X‐band operation. The proposed AMC unit cells present prominent features such as symmetric structures and wide bandwidths with distinct capabilities. To achieve an accurate evaluation of AMC performance, the reflection and band gap properties of the finite periodic AMC surfaces are investigated. The finite periodic arrays of the AMC reflectors are implemented and tested. The measured results show that they can be applied for wideband applications in microwave circuits and low profile antennas. The 15 × 15 AMC planar and stacked arrays under normal incidence operate at the frequencies of 9.89 and 10.25 GHz with the measured bandwidths of 7.85 to 12.02 GHz and 7.77 to 12.58 GHz, respectively. In addition, to identify the band gap properties of the finite periodic planar and stacked AMC arrays, the method of the suspended microstrip line is applied. For this purpose, the measured band gaps of the planar and stacked arrays include the ranges of 8.12 to 12.63 GHz and 7.81 to 12.10 GHz below −20 dB, respectively.