Admittance of a rectangular slot which is backed by a rectangular cavity

Galejs, Janis

doi:10.1109/tap.1963.1138001

Cited by 104 publications

(27 citation statements)

References 5 publications

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“…The analysis for this type of structure requires consideration of the slot resonances alongside the cavity resonances [13] [14]; however, the situation here using a stripline feed (on an electrically-thin substrate) needs only consideration of the cavity as a two-dimensional resonator. The slot"s lowest resonate frequency (for the TE10 slot mode) is when its length is approximately a half wavelength in air (the dielectric constant of the substrate having a secondary effect on the resonant frequency), while the orthogonal cavity modes" resonant frequencies depend primarily upon the dimensions and substrate dielectric constant.…”

Section: B Fixed-frequency Prototypementioning

confidence: 99%

Configurable microwave structures for software defined (and cognitive) radio front ends

Warr

Hilton

2010

2010 10th Mediterranean Microwave Symposium

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Abstract-Both Software Defined Radio and Cognitive Radio require a flexible transceiver front end. This paper introduces solutions to two important features of such a device; the antenna and the filter. These are both microwave resonant structures and so share design trade-offs and restrictions; in this application they must both offer some degree of tunability or wideband performance. MEMS technology is proposed as the enabler for reconfigurability in the distributed microwave structures. This technology overcomes the shortcomings of both large-scale mechanical devices and semiconductor-based solutions.

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Section: B Fixed-frequency Prototypementioning

confidence: 99%

Configurable microwave structures for software defined (and cognitive) radio front ends

Warr

Hilton

2010

2010 10th Mediterranean Microwave Symposium

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“…The theoretical methods for analysis of the radiating properties of the slot/hole were first elaborated in the mid-1940s [6][7][8][9][10]. These methods, however, considered only the small holes and offered approximate formulations of the boundary problems.…”

Section: Introductionmentioning

confidence: 99%

Axially-Symmetric Tm-Waves Diffraction by Sphere-Conical Cavity

Kuryliak¹,

Nazarchuk²,

Trishchuk³

2017

PIER B

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Abstract-The problem of axially-symmetric TM-wave diffraction from the perfectly conducting sphere-conical cavity is analysed. The cavity is formed by a semi-infinite truncated cone; one of the sectors of this cone is covered by the spherical diaphragm. The problem is formulated in terms of scalar potential for spherical coordinate system as a mixed boundary problem for Helmholtz equation. The unknown scalar potential of the diffracted field is sought as expansion in series of eigenfunctions for each region, formed by the sphere-conical cavity. Using the mode matching technique and orthogonality properties of the eigenfunctions, the solution to the problem is reduced to an infinite set of linear algebraic equations (ISLAE). The main part of asymptotic of ISLAE matrix elements determined for large indexes identifies the convolution type operator. The corresponding inverse operator is represented in an explicit form. The convolution type operator and corresponding inverse operator are applied to reduce the problem to the ISLAE of the second kind. This procedure determines the new analytical regularization method for the solution of wave diffraction problems for the sphere-conical cavity. The unknown expansion coefficients, which are determined from the ISLAE by the reduction, belong to the space of sequences that allow obtaining the solution which satisfies all the necessary conditions with the given accuracy. The particular cases, such as transition from sphere-conical cavity to the open hemispherical resonator, as well as the low frequency approximation, are analysed. The numerically obtained results are applied to the analysis of TM-waves radiation through the circular hole in the cavity.

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“…In the present, rectangular waveguides are widely used in microwave engineering for antenna [4], filters [5,6], couplers [7], and so forth due to their advantages of low losses, high power handling, and high isolation [8]. In addition, slot array antennas based on waveguides that feature favorable antenna performance such as high directivity, low cross-polarization, and low crosstalk have been presented [9,10,15].…”

Section: Introductionmentioning

confidence: 99%

Logarithmic Slots Antennas Using Substrate Integrated Waveguide

Kachhia

Patel

Vala

et al. 2015

International Journal of Microwave Science and Technology

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This paper represents new generation of slotted antennas for satellite application where the loss can be compensated in terms of power or gain of antenna. First option is very crucial because it totally depends on size of satellite so we have proposed the high gain antenna creating number of rectangular, trapezoidal, and I shape slots in logarithm size in Substrate Integrated Waveguide (SIW) structure. The structure consists of an array of various shape slots antenna designed to operate in C and X band applications. The basic structures have been designed over a RT duroid substrate with dielectric constant of 2.2 and with a thickness of 0.508 mm. Multiple slots array and shape of slot effects have been studied and analyzed using HFSS (High Frequency Structure Simulator). The designs have been supported with its return loss, gain plot, VSWR, and radiation pattern characteristics to validate multiband operation. All the proposed antennas give gain more than 9 dB and return loss better than −10 dB. However, the proposed structures have been very sensitive to their physical dimensions.

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Admittance of a rectangular slot which is backed by a rectangular cavity

Cited by 104 publications

References 5 publications

Configurable microwave structures for software defined (and cognitive) radio front ends

Configurable microwave structures for software defined (and cognitive) radio front ends

Axially-Symmetric Tm-Waves Diffraction by Sphere-Conical Cavity

Logarithmic Slots Antennas Using Substrate Integrated Waveguide

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