Compact-Transmission-Line Decoupling and Matching Network of Three-Element Array for Wireless Applications

In this paper, a compact-transmission-line (TL) decoupling and matching network (DMN) for three-element circular arrays is presented. As result of the miniaturization wireless terminals, antenna spacing too close, leading to large couplings deteriorating system performance. The DMN consists an impedance transformation section star-shaped neutralization which eliminates between antennas while occupying smaller area. converts odd even mode conductances feeding line, susceptances complete antenna. circuit utilizes area surrounded by in more efficient manner than traditional triangle circuits. This facilitates folding TL circuit. A design formula given each module after it has been analyzed analytically. example simulated manufactured with diameter occupied less quarter wavelength. At working frequency, port isolation increased from 7.6 dB 33.5 dB. ECC ports reduced 0.11 0.011, validates method proposed.