A Miniaturized Uniplanar Metamaterial-Based EBG for Parallel-Plate Mode Suppression

2016 ◽  
Vol 64 (4) ◽  
pp. 1176-1185 ◽  
Author(s):  
Stuart Barth ◽  
Ashwin K. Iyer
Keyword(s):  
Parallel Plate ◽  
Mode Suppression

scholarly journals Radiation Efficient Unidirectional Low-Profile Slot Antenna Elements for X-Band Application

2005 ◽  
Vol 3 ◽  
pp. 143-146
Author(s):  
C. Löcker ◽  
T. Vaupel ◽  
T. F. Eibert
Keyword(s):  
Parallel Plate ◽  
Radiation Efficiency ◽  
Slot Antenna ◽  
Coupling Coefficients ◽  
Rectangular Slot ◽  
Mode Suppression ◽  
Low Profile ◽  
Shorting Pin ◽  
Strong Excitation ◽  
Back Reflector

Abstract. Slots in metallic ground planes are very promising candidates for conformal antenna applications. However, a low-profile unidirectional antenna requires a back reflector close to the slot and the resulting stripline feed causes strong excitation of parallel-plate modes. In this contribution, we consider unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins. Starting from a parametric study with respect to shorting pin location and back reflector distance, we present a stripline-fed rectangular slot element with radiation efficiency of more than 80% and a bandwidth of about 5% at centre frequency 10GHz. A careful optimisation of shorting pin locations guarantees reliable parallel-plate mode suppression without deteriorating the slot radiation behaviour. Coupling coefficients between parallel and aligned rectangular slot elements are presented. For increased bandwidth applications, a bow-tie slot element with about 8% bandwidth and radiation efficiency of close to 80% is proposed.

scholarly journals Design and experimental verification of ridge gap waveguide in bed of nails for parallel-plate mode suppression

2011 ◽  
Vol 5 (3) ◽  
pp. 262 ◽  
Author(s):  
P.-S. Kildal ◽  
A.U. Zaman ◽  
E. Rajo-Iglesias ◽  
E. Alfonso ◽  
A. Valero-Nogueira
Keyword(s):  
Experimental Verification ◽  
Parallel Plate ◽  
Mode Suppression
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