Theoretical and experimental study of metal grid angular filters for sidelobe suppression

Franchi, Peter R.; Mailloux, Robert J.

doi:10.1109/tap.1983.1143079

Cited by 28 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An initial guess is needed to start the nonlinear optimization. In the present work, the initial guess is found by treating the radiation pattern as the frequency response of a Chebyshev bandpass filter in the angular domain, as in [22]. At each iteration, the radiation pattern of the resulting antenna is evaluated and compared with the target function.…”

Section: Optimization Proceduresmentioning

confidence: 99%

“…In this work, a dielectric stratification was employed as a spatial filter in order to obtain a Chebyshevlike radiation pattern. Franchi and Mailloux followed a similar approach to obtain an angular filter using metallic grids [22] instead of dielectric slabs. In both cases, the design was performed using classical filter design techniques that did not take into account the actual nature of the sources used in the design.…”

Section: Introductionmentioning

confidence: 99%

“…The idea was to apply the well-known formulas for Chebyshev band-pass filters, moving the problem from the frequency to the angular domain to derive the design parameters of the radiating structure. The solution proposed in [22] is the starting point of our optimization procedure for the flatted-topped case. However, as a difference with [22], the real spectral transmission line representation of the superstrate configuration is adopted for the evaluation of the radiated far field taking into account the position and nature of the feeding sources, leading to more accurate results and general procedure.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization Procedure for Planar Leaky-Wave Antennas With Flat-Topped Radiation Patterns

Scattone

Ettorre

Sauleau

et al. 2015

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

International audienceWe describe here an optimization procedure to shape the radiation pattern of planar two-dimensional (2-D) leaky-wave antennas. The structures under investigation are superstrate configurations made by partially reflecting screens (impedances sheets) over a ground plane and excited by open-ended waveguides. The antenna configuration providing the required radiation pattern is obtained by resorting to an ad hoc optimization procedure that minimizes the mean squared error between the target pattern and the actual radiated far field. The radiated field is analytically evaluated using a Green's function spectral approach to speed up the optimization process. Several kinds of radiation patterns can be obtained using the proposed algorithm. In this work, we focus our attention on flat-topped radiation patterns, suitable as element pattern for phased array antennas covering a limited angular field of view such as those considered for space applications. The proposed procedure is validated by full-wave results and measurements

show abstract

Section: Optimization Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization Procedure for Planar Leaky-Wave Antennas With Flat-Topped Radiation Patterns

Scattone

Ettorre

Sauleau

et al. 2015

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…For antenna element, such as patch antennas, the pattern synthesis is based on the control of the excitation of resonant modes on the patch [2]. Alternatively, the superstrates using homogeneous dielectric structure (HDS) and/or periodic metal structure (PMS) have been found to be very useful in the pattern synthesis in spatial domain or spectral domain [3][4][5][6][7][8][9][10][11][12][13][14]. In [15], it is shown that these two structures can have same reflection coefficients and may provide almost identical effect.…”

Section: Introductionmentioning

confidence: 99%

Pattern synthesis for multi‐layered perforated dielectric superstrate loaded patch antenna with equal E / H beamwidth

Zong

et al. 2018

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

The pattern synthesis based on the spectral Green's functions for multi‐layered perforated dielectric loaded patch antenna is presented. It is conducted by optimising the dielectric superstrate parameters, i.e. relative permittivity (εr) and thickness. To solve the problem of the optimised εr unavailable from market, perforated dielectric superstrate (PDS) is utilised. The equivalence between PDS and homogeneous dielectric superstrate (HDS) in spectral domain is investigated and the effective relative permittivity (εreff) of PDS is studied. Moreover, by introducing εreff, the general optimisation procedure for HDS loaded antenna is also applicable for PDS loaded antenna, which reduces the computational cost significantly. To validate their method, a two‐layer PDS loaded patch antenna with E/H beamwidth equalisation was designed, fabricated and measured. Simulations and measurements show that the synthesised antenna has satisfactory performances over the ITU‐RS.1068‐1994 band from 13.75 to 14 GHz. The half 10 dB E/H beamwidths of 19°/20°, −27 dB cross polarisation and −15.5 dB side lobe level have been achieved.

show abstract

“…The shaping of the FSS angular/frequency response is typically based on cavity-filter synthesis techniques, so that more selective patterns are normally obtained by stacking a higher number of resonant FSS layers to increase the filter order [144]- [152]. Based on this concept, several technologies such as layered dielectrics [144], multilayered coupled printed circuits [145] (including cascaded substrate integrated waveguide (SIW) cavities [146], [147]), metal strip/ patch gratings [148], [149], or metal grids [150], have been proposed. In all cases, the filter volume and complexity increase as more demanding specifications are added in spatial and frequency domains, resulting in an increased number of cascaded resonant FSS layers [144]- [152].…”

Section: Introductionmentioning

confidence: 99%

Analysis and synthesis of leaky-wave devices in planar technology

Ros¹,

Javier²

View full text Add to dashboard Cite

List of Figures 4.22 Theoretical, simulated and measured radiation patterns at the design frequency of 15 GHz for the conventional rectilinear HMLWA. 4.23 Theoretical, simulated and measured radiation patterns at the design frequency of 15 GHz for the conformal non-tapered HMLWA. 4.24 Theoretical, simulated and measured radiation patterns at the design frequency of 15 GHz for the conformal tapered HMLWA.. . 4.25 Theoretical, simulated and measured radiation patterns at the design frequency of 15 GHz for the conformal tapered SIW LWA.. .

show abstract

Theoretical and experimental study of metal grid angular filters for sidelobe suppression

Cited by 28 publications

References 5 publications

Optimization Procedure for Planar Leaky-Wave Antennas With Flat-Topped Radiation Patterns

Optimization Procedure for Planar Leaky-Wave Antennas With Flat-Topped Radiation Patterns

Pattern synthesis for multi‐layered perforated dielectric superstrate loaded patch antenna with equal E / H beamwidth

Analysis and synthesis of leaky-wave devices in planar technology

Contact Info

Product

Resources

About