High Isolation Mimo Antenna Using Semi-Circle Patch for Uwb Applications

Abstract

A compact Multiple Input Multiple Output (MIMO) antenna of size 41 × 30 × 0.8 mm 3 is proposed in this paper for Ultra-Wideband (UWB) application with high isolation. The proposed UWB-MIMO antenna consists of two SemiCircle Antennas (SCA) which acts as a radiating patch for achieving UWB operation. The frequency range of UWB is from 3.04 to 10.87 GHz. The high isolation is achieved by inserting an E-shaped slot in the radiating patch, and further enhancement is achieved by inserting a narrow slot in the ground plane. The proposed antenna is simulated using CADFEKO tool. The antenna is fabricated and tested for its performance using Network Synthesizer. It is observed from the results that the antenna is suitable for UWB applications.

A Review on Different Techniques of Mutual Coupling Reduction Between Elements of Any MIMO Antenna. Part 1: DGSs and Parasitic Structures

“…Along with the neutralization line, four slits have been etched in the ground (Yang et al., 2016) to reduce MC between the elements of the multiband MIMO antenna working for GSM, DCS, and long term evolution (LTE) indoor applications. Two slots (Addaci et al., 2014), a wide slot and a pair of narrow slots (Nandi & Mohan, 2017) as represented in Figure 9a, six slits (Jaglan et al., 2017, 2018), simple wide slot (Ouyang et al., 2011), a vertical slot along with T‐shaped ground stub (Liu et al., 2015) as represented in Figure 9b, inverted T‐shaped slot along with a capacitor (Park et al., 2012), one T‐shaped slot and two‐stepped slots (Jetti & Nandanavanam, 2018) as described in Figure 10a, a narrow slot (Ren et al., 2014) as represented in Figure 10b, slitted pattern (Chiu et al., 2007), two symmetric stepped “L”‐shaped open ground slots (Biswal & Das, 2018b), T‐shaped slot impedance transformer (Zhang et al., 2012), two λ /4 slots (Zuo et al., 2010), E‐shaped slot on the radiator and narrow ground slot (Bhanumathi & Sivaranjani, 2019), slot line based DGS (Hussain et al., 2019), six pair of slits (Wu & Chu, 2014), n shaped slot etched below the feed‐line (Ul Haq & Koziel, 2018), meandered slot (Ayatollahi et al., 2012), L‐shaped slot (Huang et al., 2015a), series of slits (Li et al., 2009), four slots etched (Ikram et al., 2018), H‐shaped slot (Kang et al., 2016), as represented in Figure 11a, quasi‐cross‐shaped slot (Lu et al., 2011), two T‐slots, and a rectangular slot (Marzudi et al., 2015), as described in Figure 11b, triangular slots and meshed metal strip (Nirmal et al., 2019), again a pair of slits (Sharawi et al., 2012), two λ /2 slots (Sonkki & Salonen, 2010), cross‐shaped slot and a sickle‐shaped metallic strip (Srivastava & Mohan, 2015), two U‐shaped slots (Zhou et al., 2012) as represented in Figure 12a, two asymmetric dumbbells shaped slot, and one decoupling slot (Yang et al., 2018) as depicted in Figure 12b while a P‐shaped slot and two F‐shaped strips (Zhai et al., 2013) have been inserted in the ground p...…”

Miniaturized CPW-fed UWB-MIMO antennas with decoupling stub and enhanced isolation

“…Various decoupling stubs are used to enhance isolation [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

“…Various conventional designs have been proposed for UWB application [2][3][4][5][6][7]; however, there is a problem of multipath fading associated with UWB technology in dense medium. To overcome multipath fading various, multiple-input and multiple-output (MIMO) antenna designs with a decoupling stub have been proposed [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

“…A quad-element hexagon-molecule-shaped UWB fractal MIMO antenna having a half-circular partial ground of size 40 × 40 mm 2 with an inter-port isolation greater than 20 dB and operating over the frequency range from 2.4 to 10.6 GHz having an impedance bandwidth of 9 GHz is investigated in [20]. A quarter-wave-fed, bi-radiating elements E-slot semi-circular MIMO antenna of size 42 × 30 mm 2 for UWB applications is proposed in [21], having an inter-port isolation of greater than 20 dB and operating over the frequency range from 3.04 to 10.87 GHz. A narrow rectangular slot is introduced into ground for better port isolation and efficiency of greater than 76% is also noted.…”

A Novel Two Ports MIMO Antenna Having Dual Stopped-band Functionality and Enhanced Isolation

“…The simulated results are validated with the experimental results in an anechoic chamber. A 41 × 30 mm 2 dimension UWB MIMO antenna with operating bandwidth (3.04 to 10.87 GHz) is proposed [21]. It is designed to achieve high isolation by etching an E-shaped slot into the radiating component and a narrow slot into the ground.…”