Conference Paper

Mutual coupling reduction in microstrip antennas by using dual layer uniplanar compact EBG (UC-EBG) structure

DOI: 10.1109/ICMMT.2010.5525255 Conference: Microwave and Millimeter Wave Technology (ICMMT), 2010 International Conference on


Electromagnetic band-gap (EBG) structures can serve in the reduction of mutual coupling by using their capability of suppressing surface waves propagation in a given frequency range. In this paper, a dual layer uni-planar compact EBG (UC-EBG) structure is analyzed and its dispersion diagram is extracted using the commercial finite element full wave solver High Frequency Structure Simulation (HFSS). This UC-EBG structure can be built using planar fabrication technique without any modification. The dual layer UC-EBG structure, having a lower resonant frequency than the single layer one, is inserted between E-plane coupled microstrip antenna arrays to reduce the mutual coupling. This method has been verified by the HFSS simulations and as a result, a significant 17 dB mutual coupling reduction is noticed from the simulations.

49 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: Based on the concept of slow wave propagation, a dual-layer electromagnetic band gap (EBG) mushroom structure is used to reduce the area of a patch multi-antenna sub-system. While the inner layer aids in the antenna miniaturization, the more compact upper layer helps in further reduction of the mutual coupling between the miniaturized patch antennas which is otherwise not possible for a single-layer EBG. Simulation is also performed for the mutual coupling and radiation characteristics of the multi-antenna structure for different inter-element separations which are experimentally verified.
    No preview · Article · Jul 2011
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Reducing mutual coupling is an important topic in array antenna design. This paper proposes a uniplanar compact electromagnetic band-gap (UC-EBG) structure in order to reduce mutual coupling between waveguide-fed slot array antennas by suppressing the unwanted surface waves. The paper proposes a UC-EBG arrays configuration and a waveguide broadside resonant slot arrays of 2 × 5 elements at X-band.
    Full-text · Conference Paper · Nov 2013
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A compact planar meander-bridge high impedance electromagnetic structure (MBHIES) was designed and its bandgap characteristics, mutual coupling reduction abilities were studied and compared in detail. Several parametric analyses were performed to obtain optimized design values and the transmission responses were calculated through the suspended microstrip line and waveguide simulation methods. The achieved bandgap is 2.3 GHz (2.55–4.85 GHz) with −61 dB minimum transmission coefficient level at the center frequency of 3.6 GHz. To see the effectiveness, the proposed design was inserted between a microstrip patch antenna array which operates at 3.8 GHz and whose operating bandwidth falls within the MBHIES bandgap. The surface wave suppression phenomenon was analyzed and simulated results are verified by measuring the fabricated prototypes, both are in good agreement. The configuration reduced the mutual coupling by 20.69 dB in simulation and 19.18 dB in measurement, without affecting the radiation characteristics of the array but increasing the gain slightly.
    Full-text · Article · Jan 2013 · Materials
Show more