Infinite phased arrays of cavity-backed patches

Zavosh, F.; Aberle, J.T.

doi:10.1109/8.280726

Cited by 62 publications

(23 citation statements)

References 6 publications

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“…It can be seen how as the size of the array increases, the curves show more ripples converging towards the smooth curve obtained from the infinitearray model that has been computed using the procedure developed in [11]. As for conventional patches placed between metal walls [4], the cavity enclosure of U-slot patches provides an improvement in scan performance. For the same patch arrays with a conventional continuous substrate, a substantial reduction in the scan coverage may be expected owing to the surface wave excitation.…”

Section: B Analysis Of the Array Scanning Performancementioning

confidence: 97%

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Performance characterization of wideband, wide-angle scan arrays of cavity-backed U-slot microstrip patch antennas

Córcoles

González

Rubio

et al. 2008

Int J RF and Microwave Comp Aid Eng

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This work looks at the use of wideband cavity-backed U-slot microstrip antennas in finite phased arrays. This configuration retains the single-patch and single-layer characteristics of conventional microstrip antenna arrays and provides a good impedance matching over wider scan angles when electrically thick substrates are used to improve the frequency bandwidth. The characteristics of finite phased arrays of U-slot rectangular microstrip patches enclosed in cylindrical cavities are analyzed from a validated hybrid methodology based on the finite element method, the modal analysis, and the properties of spherical waves. The results are compared with those obtained using an infinite array model.

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Section: B Analysis Of the Array Scanning Performancementioning

confidence: 97%

“…Cavity enclosed microstrip antennas have been proposed to prevent surface wave excitation providing advantages with respect to the conventional configuration in continuous dielectric layers. In phased-array antennas this geometry provides larger scan volumes improving the impedance matching [4].…”

Section: Introductionmentioning

confidence: 99%

Performance characterization of wideband, wide-angle scan arrays of cavity-backed U-slot microstrip patch antennas

Córcoles

González

Rubio

et al. 2008

Int J RF and Microwave Comp Aid Eng

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show abstract

“…The insertion of metallic walls between the patch elements also has been considered in the last years to prevent surface wave modes. This configuration allows to utilize thick substrates in order to increase the impedance bandwidth of the antenna without the limitation in the scanning range or even to achieve a considerable improvement in scan performance [5]. To analyze multilayer structures, full wave efficient numerical methods based on modular approaches have been proposed [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

Radiation pattern computation of cavity-backed and probe-fed stacked microstrip patch arrays

Aza

Encinar

Zapata

2000

IEEE Trans. Antennas Propagat.

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In this paper, two different methods based on the Floquet's harmonic expansion of the electromagnetic field in halfspace are proposed to determine the active element pattern of infinite planar arrays. They allow us to obtain the radiating characteristics without the limitations of the conventional method from the active reflection coefficient. Both are applied to analyze the scan performance in the case of probe-fed and cavity-backed microstrip arrays from its generalized scattering matrix (GSM), computed previously with a full wave numerical procedure. Numerical results are presented and compared with other techniques.

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“…From (1) and Table I we find the explicit form of the boxed electric scalar potential Green's function as (6) Adding and substracting the quasi-static part of the spectral domain Green's function , we obtain the following two series which must be treated separately: The quasi-static part of the spectral domain Green's function can now be computed by simply taking the limiting case . For instance, for the case of the electric scalar potential we obtain the following quasi-static spectral domain terms: (8) with and being real constants obtained under TM and TE wave excitations, respectively, and the transverse or radial wavenumber has been defined in the usual way (9) From (8) it can be easily observed that the quasi-static series in (7b) depends on for the TM part and on for the TE part.…”

Section: The Hybrid Approach: Extraction Of Quasi-static Termsmentioning

confidence: 99%

Two techniques for the efficient numerical calculation of the Green's functions for planar shielded circuits and antennas

Álvarez‐Melcón

Mosig

2000

IEEE Trans. Microwave Theory Techn.

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Abstract-In this paper we present new contributions to the computation of the Green's functions arising in the analysis of multilayered shielded printed circuits and antennas. First the quasistatic term of the spectral domain Green's functions is extracted so that the convergence of the reminder dynamic modal series is enhanced. Moreover, it is shown that by extracting a second-order quasi-static term the convergence is further improved. In regard to the quasi-static terms they are computed in the spatial domain by numerically evaluating the associated spatial images series. Then a new and efficient technique is developed for the summation of the slowly convergent modal series. The technique can be viewed as the application of the integration by parts technique to discrete sequences and greatly accelerates the convergence rate of the series involved. It is shown that the new algorithm is numerically very robust and leads to a drastic reduction in the computational effort and time usually required for the numerical evaluation of the shielded Green's functions.

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Infinite phased arrays of cavity-backed patches

Cited by 62 publications

References 6 publications

Performance characterization of wideband, wide-angle scan arrays of cavity-backed U-slot microstrip patch antennas

Performance characterization of wideband, wide-angle scan arrays of cavity-backed U-slot microstrip patch antennas

Radiation pattern computation of cavity-backed and probe-fed stacked microstrip patch arrays

Two techniques for the efficient numerical calculation of the Green's functions for planar shielded circuits and antennas

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