Article

Microstrip antennas integrated with electromagnetic band-gap (EBG) structures: a low mutual coupling design for array applications

Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
IEEE Transactions on Antennas and Propagation (Impact Factor: 2.46). 11/2003; DOI: 10.1109/TAP.2003.817983
Source: IEEE Xplore

ABSTRACT Utilization of electromagnetic band-gap (EBG) structures is becoming attractive in the electromagnetic and antenna community. In this paper, a mushroom-like EBG structure is analyzed using the finite-difference time-domain (FDTD) method. Its band-gap feature of surface-wave suppression is demonstrated by exhibiting the near field distributions of the electromagnetic waves. The mutual coupling of microstrip antennas is parametrically investigated, including both the E and H coupling directions, different substrate thickness, and various dielectric constants. It is observed that the E-plane coupled microstrip antenna array on a thick and high permittivity substrate has a strong mutual coupling due to the pronounced surface waves. Therefore, an EBG structure is inserted between array elements to reduce the mutual coupling. This idea has been verified by both the FDTD simulations and experimental results. As a result, a significant 8 dB mutual coupling reduction is noticed from the measurements.

3 Followers
 · 
339 Views
  • Source
    ICCEM 2015; 02/2015
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study presents a tailored metamaterial structure for mutual coupling suppression in the E coupled microstrip phased arrays. Configured slot combined complementary split ring resonator (SCCSRR) is proposed for decoupling. A detailed analysis of the suppression characteristics of SCCSRR is presented along with its design methodology and parametric analysis. The SCCSRR pairs have been integrated with the microstrip phased array on surface and in the ground plane without any added fabrication complexity. The proposed design offers additional coupling suppression of 19 dB as compared with non-decoupled array of same dimension. The coupling suppression of -42 dB for 3.7 GHz array has been achieved successfully. The element separation is kept at 0.5 λo and the complete design with two radiating elements measures 84 × 44 mm2.
    IET Microwaves Antennas & Propagation 12/2014; 8(15):1261-1267. DOI:10.1049/iet-map.2013.0541 · 0.97 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A compact two-channel dual trace dual column (DTDC) printed microstrip antenna array integrated with dumbbell-shaped resonator (DSR) is presented. The DSR has been integrated with DTDC array for the reduction of mutual coupling and suppression of cross-polarization (XP) level at 5.2 GHz. In this work, an omnidirectional microstrip antenna array (OMAA) is designed with five elements and then two numbers of similar arrays have been used for multiple-input multiple-output (MIMO) application. A DSR placed in between two OMAA separated by 0.54λ suppressed 12 dB mutual coupling and 7.5 dB XP level. The mutual coupling has been studied by placing DSR on the upper trace first and then in the lower trace. The mutual coupling of 11 dB is reduced when DSR is placed on the upper trace and 12 dB when it is in the lower trace of the array structure. The DTDC antenna structure exhibits maximum XP suppression when DSR in the lower trace. The antenna with compact structure based on the design has a peak gain of 12.84 dBi and band width of 250 MHz. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2182–2186, 2014
    Microwave and Optical Technology Letters 06/2014; 56(9):2182-2186. DOI:10.1002/mop.2853 · 0.62 Impact Factor

Preview

Download
14 Downloads
Available from