Effective Reflective Characteristics of Superstrates and Their Effects on the Resonant Cavity Antenna

Chen, Xing; Luo, Zhangjie; Zheng, Zongsheng; Pan, Feng

doi:10.1109/tap.2015.2399508

Cited by 26 publications

(21 citation statements)

References 22 publications

(27 reference statements)

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“…According to the ray tracing method, to obtain a cophasal EM field for a RCA with a uniform superstrate, the distance between the superstrate and the inner ground of the cavity L is required as

L = \frac{N λ}{2} + true(\frac{ϕ + φ}{π} true) \frac{λ}{4} .

where N is an integer number,

ϕ

and

φ

are the reflection phases of the metamaterial inspired superstrate and the ground plane, respectively.…”

Section: Design Of a Rca With A Uniform Metamaterials Inspired Superstmentioning

confidence: 99%

“…The gain enhancement for the RCA is determined by the amplitude of the superstrate's reflection coefficient

false| normalΓ false|

. It is expressed as

G = \frac{false| normalΓ false| + 1}{false| normalΓ false| - 1} .

…”

Section: Design Of a Rca With A Uniform Metamaterials Inspired Superstmentioning

confidence: 99%

“…According to the ray tracing method, 3,21 to obtain a cophasal EM field for a RCA with a uniform superstrate, the distance between the superstrate and the inner ground of the cavity L is required as…”

Section: E S I G N O F a R C A W I T H A U N I F O R M Me T A M Amentioning

confidence: 99%

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High performance resonant cavity antenna with non-uniform metamaterial inspired superstrate

Pan

Chen

2017

Int J RF Microw Comput Aided Eng

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The resonant cavity antenna (RCA) is a class of widely used high gain antennas, but usually suffers from narrow impedance bandwidth owing to its strong resonant property, as well as relatively low aperture efficiency because of its non‐uniform electromagnetic (EM) field distribution on the aperture. This article explores enhancing the RCA's impedance bandwidth and aperture efficiency by designing a non‐uniform metamaterial inspired superstrate, on which the metal patches vary their sizes with respect to their distances to the superstrate's center. After optimized by the Genetic Algorithm, the proposed RCA is designed, fabricated and tested. Measured results agree well with simulated ones and show that in comparison with a RCA with a uniform metamaterial inspired superstrate, this work significantly improves the |S11| < −10 dB impedance bandwidth from 2.1% to 6.1%, the gain at the working frequency 10 GHz from 19.07 dBi to 20.55 dBi, and correspondingly the aperture efficiency from 50.5% to 71%. A further analysis estimates that due to the non‐uniform metamaterial inspired superstrate, a more homogeneous distribution for both the amplitude and phase of the EM field is observed on the superstrate's aperture.

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“…According to the ray tracing method, to obtain a cophasal EM field for a RCA with a uniform superstrate, the distance between the superstrate and the inner ground of the cavity L is required as

L = \frac{N λ}{2} + true(\frac{ϕ + φ}{π} true) \frac{λ}{4} .

where N is an integer number,

ϕ

and

φ

are the reflection phases of the metamaterial inspired superstrate and the ground plane, respectively.…”

Section: Design Of a Rca With A Uniform Metamaterials Inspired Superstmentioning

confidence: 99%

“…The gain enhancement for the RCA is determined by the amplitude of the superstrate's reflection coefficient

false| normalΓ false|

. It is expressed as

G = \frac{false| normalΓ false| + 1}{false| normalΓ false| - 1} .

…”

Section: Design Of a Rca With A Uniform Metamaterials Inspired Superstmentioning

confidence: 99%

See 1 more Smart Citation

High performance resonant cavity antenna with non-uniform metamaterial inspired superstrate

Pan

Chen

2017

Int J RF Microw Comput Aided Eng

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“…As a kind of widely used high gain antennas, the Fabry-Pérot resonant antenna (FPRA) is formed by placing a superstrate with partial reflection property in front of an excitation antenna with a ground plane [1][2][3][4][5]. Various antennas have been selected as the excitation antenna for the FPRA, such as the open waveguide antenna, the microstrip antenna, and the microstrip array antenna [1,4,6]. The superstrate could be a homogeneous dielectric substrate [3,7], or metamaterial inspired one, that is usually a printed circuit board (PCB) etched periodic microstrip unit cells [2,4,8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Various antennas have been selected as the excitation antenna for the FPRA, such as the open waveguide antenna, the microstrip antenna, and the microstrip array antenna [1,4,6]. The superstrate could be a homogeneous dielectric substrate [3,7], or metamaterial inspired one, that is usually a printed circuit board (PCB) etched periodic microstrip unit cells [2,4,8,9]. In comparison with other high gain antennas such as parabolic antennas and microstrip array antennas, the FPRA possesses advantages of high gain, low profile, and high radiation efficiency.…”

Section: Introductionmentioning

confidence: 99%

3-D Printed Fabry–Pérot Resonator Antenna with Paraboloid-Shape Superstrate for Wide Gain Bandwidth

Chen

2017

Applied Sciences

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A three-dimensional (3-D) printed Fabry-Pérot resonator antenna (FPRA), which designed with a paraboloid-shape superstrate for wide gain bandwidth is proposed. In comparison with the commonly-adopted planar superstrate, the paraboloid-shape superstrate is able to provide multiple resonant heights and thus satisfy the resonant condition of the FPRA in a wide frequency band. A FPRA working at 6 GHz is designed, fabricated, and tested. Considering the fabrication difficulty caused by its complex structure, the prototype antenna was fabricated by using the 3-D printing technology, i.e., all components of the prototype antenna were printed with photopolymer resin and then treated by the surface metallization process. Measurement results agree well with the simulation results, and show the 3-D printed FPRA has a |S 11 | < −10 dB impedance bandwidth of 12.4%, and a gain of 16.8 dBi at its working frequency of 6 GHz. Moreover, in comparison with the planar superstrate adopted in traditional FPRAs, the paraboloid-shape superstrate of the proposed FPRA significantly improves the 3-dB gain bandwidth from 6% to 22.2%.

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Compact ultra‐wideband fractal monopole antenna with high gain using single layer superstrate

Singha¹,

Vakula²

2016

Micro & Optical Tech Letters

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A novel technique is applied on fractal monopole antenna to enhance gain for ultra wideband (UWB) applications. The fringing field effect of the antenna is increased by using dielectric superstrate, and it is designed by fabricating rectangular conductor on single side of the superstrate with dimension 10 3 21.5 mm 2 . The fractal structure is designed by the identical triangle structure in the radiating patch. The dielectric superstrate is placed on the fractal monopole antenna. At the time of feeding, the conductor of the superstrate is connected through ground plane of the antenna. The overall dimension of the fractal monopole antenna with superstrate is 24.5 3 21.6 3 3.15 mm 3 . The measurement result of the reflection coefficient is below 210 dB indicating impedance bandwidth of 3.1 to 11 GHz. The measured radiation patterns are also improved and peak gain of the conventional antenna increases approximately 1.6 dB by using superstrate with reference to conventional design. Figure 11 Fringing fields (Electric fields) of the superstrate loaded fractal antenna (a) 5 GHz, (b) 7 GHz, (c) 9 GHz. [Color figure can be viewed at wileyonlinelibrary.com]ABSTRACT: This paper describes properties of a new 20-bit chipless RFID tag of the size 52 3 50 mm 2 , which exhibits an improved magnitude and robustness of the radar cross section. The tag is based on a novel slots-in-plate array approach, which is complementary to a typical tag consisting of an array of single resonators. In order to eliminate the detuning effect of the missing or shortening slots representing '0' bit information on the resonances of neighbouring slots signifying '1' bit information, the modification of the inter-element arrangement was proposed. Both ways of '0' bit information coding were studied and compared.

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Effective Reflective Characteristics of Superstrates and Their Effects on the Resonant Cavity Antenna

Cited by 26 publications

References 22 publications

High performance resonant cavity antenna with non-uniform metamaterial inspired superstrate

High performance resonant cavity antenna with non-uniform metamaterial inspired superstrate

3-D Printed Fabry–Pérot Resonator Antenna with Paraboloid-Shape Superstrate for Wide Gain Bandwidth

Compact ultra‐wideband fractal monopole antenna with high gain using single layer superstrate

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