Eight-Element Antenna Array at 3.5 GHZ for Mimo Wireless Application

Abstract

Abstract-A multiple-input-multiple-output (MIMO) antenna array with eight printed coplanar waveguide (CPW)-fed monopole antennas operating at 3.5 GHz (3.4-3.6 GHz) is presented. Each antenna is an Inverted-L (IL) monopole surrounded by a parasitic IL-shorted stripe and attains compact configuration. Both the IL-monopole and parasitic IL-shorted stripe contribute their fundamental resonant modes to operate in the desired frequency band. The neutralization line (NL) and ground middle slot are used for decoupling the antenna elements in the array. The measurement results for the prototype reasonably agree with electromagnetic simulations. Measured results for the proposed MIMO antenna array demonstrate that it has impedance bandwidth more than 200 MHz with (S 11 < 6 dB), and with effective antenna decoupling mechanism, the mutual coupling is better than 10 dB for the required band (3.4-3.6 GHz). Also, envelope correlation coefficient (ECC) for the proposed MIMO antenna array is less than 0.2 for any two antennas to realize independent prorogation path for a channel. The average channel capacity of the proposed MIMO antenna array is approximately 35 to 38 bps/Hz for a reference signal to noise ratio (SNR) of 20 dB.

Mobile-Phone Antenna Array with Diamond-Ring Slot Elements for 5G Massive MIMO Systems

“…In addition, its TARC value is less than −30 at 3.6 GHz. Table 2 summarizes and compares the fundamental characteristics of the presented mobile-phone antenna with the recently reported 5G mobile-phone antenna designs [16][17][18][19][20][21][22][23][24][25]. It can be observed that the proposed design can provide better performances in terms of efficiency, isolation and ECC.…”

“…According to the requirement of cellular communications, compact, wideband and high isolation MIMO antenna is an urgent demand in the future mobile terminal and the portable applications [12][13][14][15][16][17]. Recently, several techniques have been introduced to design massive MIMO antennas for 4G and sub-6 GHz 5G mobile terminals [18][19][20][21][22][23][24][25][26][27].…”

Ultra-Wideband Diversity MIMO Antenna System for Future Mobile Handsets

“…As seen, the design has less than − 20 dB TARC values at different frequencies. The fundamental properties of the proposed MIMO diversity antenna system are compared with the recently reported MIMO antenna designs and are listed in Table 3 [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. As clearly seen, in contrast to the recently proposed designs, the designed MIMO antenna offers ultra- Another important function is the channel capacity loss (CCL) of the MIMO system [43], which mainly depends on the S-parameters of the MIMO system with the accepted limit of ≤0.4 bps/Hz and can be calculated while using the below formulas:…”

“…Several MIMO 5G smartphone antennas have been recently proposed [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. However, these smartphone antennas either suffer from narrow impedance-bandwidth (either single-band or dual/multi-band) or use single-polarized uniplanar antenna resonators occupying large spaces of the mainboard, which leads to increasing the complexity of the mobile phone system.…”

“…Tightly arranged orthogonal-mode pairs with design complexity is proposed in [23] for 5G smartphones. In [24,25], CPW-fed antenna arrays with large-clearance are introduced for sub 6 GHz MIMO handset. In [26][27][28], narrow-band antenna arrays with 100 MHz are represented to be integrated at the corners of the mainboard.…”