;In this thesis, a dual-band MIMO antenna is presented. The proposed antenna consists of a CPW-fed micro-strip line, bicyclic shape stack structure radiating patch and rectangular shape ground plane. First, we calculate a required size of the antenna. The Ansoft HFSS software is used to perform simulation. The design of a dual-band MIMO antenna satisfies the demand of the IEEE 802.11n and IEEE 802.11b standard band. The return loss of characteristic requirement is under -10dB, and the isolation of characteristic requirement is under -15dB.
The spectrum ranges with the measured return loss S11≤ -10dB of antenna is 2.25GHz~2.83GHz and 4.94GHz ~ 5.20GHz, and the percentages of the bandwidth are 22.83% and 5.13%, respectively. The spectrum ranges of the measured return loss S22≤ -10dB of antenna are 2.16GHz ~ 2.78GHz and 4.96GHz ~ 5.22GHz, the percentages of the bandwidth are 25.10% and 5.10%, respectively. The bands of communication systems in Taiwan, such as Bluetooth (2400MHz ~ 2450MHz) , Wireless Local Area Network (WLAN 2400MHz ~ 2485MHz, 5150MHz ~ 5350MHz) are included in the investigation.
