Technique of Ground Size Tuning for Isolation between Monopoles in Compact Wireless Terminals

• Achieving good isolation between two antennas in a wireless terminal is a challenge, especially if it is small compared to the wavelength. This communication presents a technique useful for two monopoles. It is based on placing the monopoles collinearly and tuning the ground plane size to approximately λ/4. Simulations and measurements are presented to illustrate the technique. Different methods of tuning the ground plane size in small terminals are discussed.

Nyckelord

Dual antennas

isolation

multiple-input multiple-output (MIMO)

wireless terminal

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