Low profile disk and sleeve loaded monopole antennas

Ravipati, C.B.; Reddy, C.J.

doi:10.1109/aps.2005.1551762

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…In order to overcome the limited application area, it is necessary to enhance the impedance bandwidth. Recently, a lot of methods have been studied to extend the antenna bandwidth such as addition of the substrate [1] or several types of sleeve structure [2], [3]. However, these methods have some disadvantages like radiation loss caused by dielectric material and structural complexity increased by sleeve structure.…”

Section: Introductionmentioning

confidence: 99%

An Improved Impedance Bandwidth of Modified UWB Antenna With Staircased Parasitic Rings

Kang

Lee

Cho

et al. 2007

Antennas Wirel. Propag. Lett.

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In this letter, a structural modification technique of simple monopole to improve the input impedance bandwidth by using multiple staircased parasitic rings is suggested. In addition, the shape and size of parasitic rings are optimized to enhance the antenna bandwidth. The final optimized parameter values have been obtained from the parametric studies of the antenna and simple equation evaluating the resonant frequency. The electrical performances of the proposed antenna are verified in terms of the return loss and the radiation pattern by using commercially available softwares, CST MW Studio, and HFSS based on FDTD and FEM algorithms, respectively.

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Section: Introductionmentioning

confidence: 99%

An Improved Impedance Bandwidth of Modified UWB Antenna With Staircased Parasitic Rings

Kang

Lee

Cho

et al. 2007

Antennas Wirel. Propag. Lett.

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“…Yang et al [7] designed a novel wideband sleeve dipole array operating between the frequency range 707-3,300 MHz. A sleeve monopole antenna with top-loading and shorting pins have been implemented by Ravipati and Reddy [8], achieving a bandwidth ratio of 3.7:1 and a bandwidth ratio of 4.28:1 by Ghafari and Aloi [9]. Bandwidth enhancement using matching networks are reported by several studies [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Design of Broadband Compact Canonical Triple-Sleeve Antenna Operating in UHF Band

Sairam

Vakula

Chakravarthy

2021

J Electromagn Eng Sci

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In this paper, a novel compact broadband antenna at UHF frequencies is presented with canonical shapes. Hemispherical, conical and cylindrical shapes have all been considered for antenna configuration. The designed antenna provides an instantaneous frequency range from 370 to 5,000 MHz with omnidirectional characteristics. The antenna was simulated in CST Microwave Studio, fabricated and evaluated; the results are presented. The simulated and measurement results are in good agreement. The antenna has voltage standing wave ratio (VSWR) ≤ 1.9:1 in 400–570 MHz, 2,530–3,740 MHz and 4,180–4,620 MHz; it has VSWR ≤ 3:1 over the operating frequency range 370–5,000 MHz and the measured gain varies from -0.6 to 4.5 dBi over the frequency band. The concept of canonical-shaped antenna elements and the incorporation of triple sleeves resulted in a reduction of the length of the antenna by 62% compared to the length of a half-wave dipole antenna designed at the lowest frequency. The antenna can be used for trans-receiving applications in wireless communication.

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“…Ravipati and Reddy designed a sleeve monopole antenna with cylindrical element having disc loading and shorting posts operating in frequency range of 350-1300 MHz for VSWR < 3 : 1. This antenna required a ground plane for its operation [5]. Gain of the antenna was not reported.…”

Section: Introductionmentioning

confidence: 99%

Design of Broadband Compact Canonical Tetra Sleeve Cage Antenna Covering Uhf Band

Sairam¹,

Vakula²,

Chakravarthy³

2019

PIER Letters

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In this paper, design of a novel broadband Canonical Tetra Sleeve Cage Antenna is presented. This antenna is designed using distributed antenna matching techniques. It has canonical shaped antenna elements and coaxial sleeves. The designed antenna operates over a wide frequency range in UHF band with omnidirectional characteristics. The proposed antenna is simulated in CST Microwave Studio, fabricated, evaluated, and the results are presented. The simulated and measurement results are in agreement. It has VSWR < 1.9 : 1 in frequency bands 270-330 MHz and 930-1670 MHz. The maximum value of VSWR in 250-1850 MHz is 3.3 : 1. The measured gain of the antenna varies from 0.6 to 5.5 dBi in the frequency range of 250 MHz to 1850 MHz. The implementation of distributed matching techniques by using canonical shaped antenna elements and tetra sleeves results in reduction of the length of the antenna by 59.86% compared to the length of a half wave dipole antenna designed at the lowest frequency. The proposed antenna finds applications in defence and wireless communication systems as a transceiver antenna.

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Low profile disk and sleeve loaded monopole antennas

Cited by 9 publications

References 5 publications

An Improved Impedance Bandwidth of Modified UWB Antenna With Staircased Parasitic Rings

An Improved Impedance Bandwidth of Modified UWB Antenna With Staircased Parasitic Rings

Design of Broadband Compact Canonical Triple-Sleeve Antenna Operating in UHF Band

Design of Broadband Compact Canonical Tetra Sleeve Cage Antenna Covering Uhf Band

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