Modified circular microstrip antenna elements

McIlvenna, J. F.; Kernweis, Nicholas

doi:10.1049/el:19790145

Cited by 22 publications

(7 citation statements)

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“…The concept of meta-materials, with both negative relative permittivity and permeability, was proposed by Veselago in 1968 [1]. Their existence has been confirmed showing unusual characteristics, not common in nature, such as a negative refractive index (NRI), negative wave vector k, negative phase velocity v p , lefthanded set (k, E, H), backward-wave (k is antiparallel to Poynting vector S), and negative group velocity v g .…”

Section: Introductionmentioning

confidence: 99%

A dual‐band antenna with coplanar ring and patch

Sun

2006

Micro & Optical Tech Letters

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In this paper, a coplanar ring and patch antenna for dual‐band operation is presented. The patch is placed inside a rectangular ring. A coupling strip located in between the rectangular ring and the patch is used to excite them through a 50‐Ω coaxial cable. The proposed antenna was built on a two‐layer (FR4 and air) substrate with an area of 28 mm by 28 mm designed for WLAN in 2.4‐ and 5.2‐GHz bands. The size of the conducting ground plane is 65 mm by 65 mm. It has a gain of about 5 dBi for both frequencies. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1785–1789, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21801

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Section: Introductionmentioning

confidence: 99%

A dual‐band antenna with coplanar ring and patch

Sun

2006

Micro & Optical Tech Letters

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“…Single layer multiband antennas can be achieved using reactive loading with stubs [5], monolithic reactive loading [6], adding strips on the patch [7], patch trimming with a rectangular notch [8], or shorting pins [9] for closely spaced bands with frequency ratios around 1.5 : 1. Multiband printed antennas having frequency band separation of 2 : 1 or 4 : 1 employ window concept whereby windows are cut in low frequency patch radiators to accommodate high frequency patch antennas [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Slot Parameter Optimization for Multiband Antenna Performance Improvement Using Intelligent Systems

Demircioğlu¹,

Yagli²,

Gülgönül³

et al. 2015

International Journal of Antennas and Propagation

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This paper discusses bandwidth enhancement for multiband microstrip patch antennas (MMPAs) using symmetrical rectangular/square slots etched on the patch and the substrate properties. The slot parameters on MMPA are modeled using soft computing technique of artificial neural networks (ANN). To achieve the best ANN performance, Particle Swarm Optimization (PSO) and Differential Evolution (DE) are applied with ANN's conventional training algorithm in optimization of the modeling performance. In this study, the slot parameters are assumed as slot distance to the radiating patch edge, slot width, and length. Bandwidth enhancement is applied to a formerly designed MMPA fed by a microstrip transmission line attached to the center pin of 50 ohm SMA connecter. The simulated antennas are fabricated and measured. Measurement results are utilized for training the artificial intelligence models. The ANN provides 98% model accuracy for rectangular slots and 97% for square slots; however, ANFIS offer 90% accuracy with lack of resonance frequency tracking.

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“…Single layer double-band natenna may be achieved by several techniques.Firstly the reactively loaded microstrip antenna [6]where two different coaxial stubs are used. another one is the dual band microstrip antenna with monolithic reactive loading [7] or with modified circular disc by adding additional strips [8], or by patch trimming with a rectangular notch [9], or by adding shorting pins [10].These concepts are ideal for closely spaced bands having frequency ratios up to 1.5:1. Another way of designing multi-band printed antennas based on the "window" concept having frequency band separation of 2:1 [11] or 4:1 [12] whereby windows were cut in a low frequency patch radiators to accommodate high frequency patch antennas.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Enhansment of Microstrip Antenna

Abdelaziz¹

2006

PIER

118

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Abstract-A novel microstrip antenna with wide bandwidth is presented. Two different radiating elements connected together through a matched section and are embedded on a single layer structure. This new structure offers a dual-band microstrip antenna. By controlling the two resonance frequencies of the two elements, a wide frequency bandwidth of approximately 9% has been achieved. A more bandwidth enhancement, up to 12%, has been achieved by adding two parasitic elements to one element of the proposed antenna. Fabrication and measurement of S 11 for the proposed antenna has been done. The measured results have been compared with the simulated results using commercial software HFSS version-8.0.

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Modified circular microstrip antenna elements

Cited by 22 publications

References 0 publications

A dual‐band antenna with coplanar ring and patch

A dual‐band antenna with coplanar ring and patch

Slot Parameter Optimization for Multiband Antenna Performance Improvement Using Intelligent Systems

Bandwidth Enhansment of Microstrip Antenna

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