A General Method for Designing Reduced Surface Wave Microstrip Antennas

Komanduri, Varada Rajan; Jackson, David R.; Williams, Jeffrey T.; Mehrotra, Akhil

doi:10.1109/tap.2013.2254441

Cited by 41 publications

(14 citation statements)

References 11 publications

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“…To analyse the electromagnetic properties of the structures and the effects of surface waves, the finite element method (FEM) is used to simulate their performance. The effects of surface wave excitation are lower antenna efficiency, degradation of the radiation pattern and undesired coupling between the elements in an array design [36,37]. The reflection coefficient and the radiation efficiency of proposed antennas clearly shows the minimum effect of surface wave propagation in proposed design.…”

Section: Resultsmentioning

confidence: 91%

Higher-order mode substrate integrated waveguide cavity excitation for microstrip patch antenna arrays at 30-GHz

et al. 2019

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This paper presents a novel approach to the design and fabrication of low-cost and high-gain aperture-coupled microstrip patch antenna (AC-MPA) arrays with improved radiation pattern for millimetre-wave applications such as simultaneous wireless information and power transfer (SWIPT) and Internet-of-Things (IoT) device connectivity. A higher-order mode substrate integrated waveguide (SIW) cavity is used to feed the MPA arrays through aperture coupling. The improved design approach is introduced and discussed in detail. Simulation and experimental results for 2×2 and 4×4 arrays are presented, demonstrating excellent agreement. Key performance metrics are side-lobe levels of less than −24 dB and −29 dB in the E-plane and −22 dB and −26 dB in the H-plane and realized gain of 11 dBi and 15 dBi for the 2×2 and 4×4 arrays respectively, at a design frequency of 30 GHz.

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Section: Resultsmentioning

confidence: 91%

Higher-order mode substrate integrated waveguide cavity excitation for microstrip patch antenna arrays at 30-GHz

et al. 2019

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“…By properly selecting the substrate material and the permittivity of the substrate filling material, it is possible to eliminate the excitation of the dominant surface wave by an arbitrarily shaped patch, when it is operating at resonance. The reduced surface wave theorem [4] states that the surface wave propagation decreases if the dielectric constant of the substrate in the patch cavity is chosen to be…”

Section: Validation Of Results Using Reduced Surface Wave Theoremmentioning

confidence: 99%

“…This proves to be the hindrance to radiation characteristics of the antenna as the power is lost due to leakage from the edges. The surface wave propagation can be controlled by micromachining technology [4]. The portion of substrate beneath the patch antenna is etched out by micromachining.…”

Section: Introductionmentioning

confidence: 99%

Surface Wave Suppression in LHCP Microstrip Patch Antenna Embedded on Textured Pin Subsrtate

Roy¹,

Mittal²

2019

PIER C

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Propagation of surface waves in dielectric underneath a microstrip patch antenna poses serious hindrance to the radiation mechanism. Several methods are being tried for suppression of surface wave. Metamaterial substrate is presented here with periodic arrangement of metallic cylindrical pins except the area underneath the radiating microstrip patch. The periodic arrangement of metallic cylindrical pins with negative dielectric constant has considerably high reflection coefficient to drive the extraneous surface wave fields towards the fringing fields of the antenna. The textured pin substrate leads to generation of forbidden band gap for the propagation of TM 0 surface wave modes and thus enhances radiation characteristics. The proposed structure proves to be highly beneficial for improving radiation efficiency and gain. Parametric analysis has also been presented for the gain enhancement by varying pin diameter, spacing between pins, and air gap between dielectric substrates. A uniform gain of 10 dB has been achieved for a Left Hand Circularly Polarized (LHCP) microstrip patch antenna. The axial ratio achieved in the described band is 200 MHz. The antenna has been designed for WLAN applications.

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“…However, developing various dielectrics with high thermal conductivity similar to aluminum nitride (AIN) ceramic can overcome even this obstacle. Other problems like surface waves, spurious radiation and losses can be controlled in different ways [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Frequency scanning antenna arrays with metamaterial based phased shifters

2019

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This paper presents a simple design of linear series-fed frequency scanning antenna arrays with: (a) identical rectangular dipoles and (b) pentagonal dipoles having different impedances to provide enhanced side lobe suppression. Phase shifters are designed as a metamaterial unit cell consisting of split-ring resonators coupled with the parallel microstrip line. Shifter models variations are described and control of phase is demonstrated. Two antenna arrays are manufactured and measured.

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A General Method for Designing Reduced Surface Wave Microstrip Antennas

Cited by 41 publications

References 11 publications

Higher-order mode substrate integrated waveguide cavity excitation for microstrip patch antenna arrays at 30-GHz

Higher-order mode substrate integrated waveguide cavity excitation for microstrip patch antenna arrays at 30-GHz

Surface Wave Suppression in LHCP Microstrip Patch Antenna Embedded on Textured Pin Subsrtate

Frequency scanning antenna arrays with metamaterial based phased shifters

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