Impedance matching of a dual-frequency microstrip antenna with an air gap

Lee, C.S.; Nalbandian, V.

doi:10.1109/8.222288

Cited by 13 publications

(9 citation statements)

References 9 publications

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“…First we have studied the matching [9] of larger patch with patch offset (X L ) from the centre of the feed line in absence of the other patch. The variation of the return loss is shown in fig-2.…”

Section: Simulations Resultsmentioning

confidence: 99%

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Dual frequency planar microstrip antenna

Chakrabarti

2009

2009 Applied Electromagnetics Conference (AEMC)

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In this paper a simple technique to develop a two layer dual frequency antenna with identical polarization at two far apart frequencies has been presented. Dual rectangular resonator proximity coupled planar microstrip antennas has been designed, fabricated and tested. The design optimisation was carried out using commercial MoM based simulation software. The patch width, intermediate spacing between the coplanar patches are optimized by successive simulations using the commercial software. Measured gain at both the frequencies is over 6dBi. Measured results are also presented.

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Section: Simulations Resultsmentioning

confidence: 99%

“…Dual frequency antenna can be realized in number of techniques [1][2][3][4][5][6][7][8][9]. Good overview are given by Maci and Gentili [1].…”

Section: Introductionmentioning

confidence: 98%

Dual frequency planar microstrip antenna

Chakrabarti

2009

2009 Applied Electromagnetics Conference (AEMC)

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“…One such example has been presented recently [6] in a dual-frequency application, where the cavity concept and measurement for an air-gap impedance matching were demonstrated. The configuration similar to [6] has been calculated by using the proposed model for the aperture admittance and an S-parameter-based approach for the air gap [lo]. Figure 8 shows both simulation and experimental results for an L-band (single-frequency) application.…”

Section: Compared With Measurementsmentioning

confidence: 99%

“…z , " = -n d , n = 1 , 2 , 3 ,..., (4) (6) z , b = n d + S , n = 1 , 2 , 3 ,..., Then, by applying the boundary condition that the electric field on the microstrip line must vanish and following the…”

Section: Theoretical Formulationmentioning

confidence: 99%

“…Considering now a dielectric-filled slice waveguide antenna as shown in Figure 1, which is electrically small and is under current research for GPS mobile navigation, the above models may not be applied directly. Recently, Lee and Nalbandian [6] reported an impedance-matching approach for a waveguide-type microstrip antenna, but they used a cavity model and gave no aperture details. In this article we reexamine the admittance of an aperture radiating from a medium of higher density (dielectric) to a medium of lower density (free space).…”

Section: Introductionmentioning

confidence: 99%

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The aperture admittance of a flanged dielectric‐filled waveguide antenna

Tian¹,

Ligthart²

1995

Micro & Optical Tech Letters

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The aperture admittance is formulated for a slice dielectric‐filled (ϵr ≥ 1) rectangular waveguide antenna. By considering the specific media discontinuity at the aperture, the formulation is able to predict aperture admittance of the waveguide with various dimension ratios and dielectrics. The summarized results are new in the sense that they have rarely been found in the literature. Calculations and supporting measurements show that the filled dielectric has an important influence, in addition to waveguide height, on the aperture admittance. The proposed approach permits a good simulation of aperture characteristics and impedance matching. © 1995 John Wiley & Sons, Inc.

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