Isolation enhancement of MIMO antennas using shorting pins

A Review on Different Techniques of Mutual Coupling Reduction Between Elements of Any MIMO Antenna. Part 2: Metamaterials and Many More

“…Another prevalent method is shorting any parasitic elements/structures through metallic vias and pins to provide an additional decoupling path for the coupled fields before it reaches the other antenna placed in closer proximity. Six metallic pins (Abdullah et al., 2019) have been shorted near the adjacent edges of a square patch antenna to its ground, as represented in Figure 17a, to minimize the MC. In another case, a folded shorting strip (Singh et al., 2013) has been attached to each of the two‐port antennae to enhance the port‐to‐port isolation.…”

“… (a) Six pairs of shorting vias (Abdullah et al., 2019) (b) metallic strip along with shorting vias (Sipal et al., 2019). …”

A Microstrip MIMO Antenna with Enhanced Isolation for WiMAX Applications

“…Many solutions have been proposed to reduce mutual coupling between antenna elements using, e.g., shorting pins [4], compact coplanar waveguide (CPW) feeding [5], electromagnetic band gap (EBG) [6], parallel coupled-line resonators [7]. These methods have reached a recognizable improvement in isolation enhancement.…”

“…These methods have reached a recognizable improvement in isolation enhancement. The isolation between the antenna elements in [4][5][6] is around 20 dB. The antenna gains are under 2 dBi in [5] and [7].…”

Ultra Wideband Compact Mi crostrip Patch Antenna for C , X and K band Applications

“…Shorting is a conventional technique used for size reduction at fixed operating frequency and bandwidth enhancement [11]. It is working as capacitive loaded patch and decreased the resonant frequency [12]- [13]. When a defect of Periodic or non-periodic shape is etched on the ground plane it is considered as defected ground structure.…”