|Author's Email Address
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|Type of Document
||Design and Implementation of Dual-Band MIMO Filtering Antennas with Good Isolation and Multiple Transmission Zeros for WLAN Applications|
|Date of Defense
stepped impedance resonator
||Recent advances in wireless communication have created a need for compact, low-cost, and low profile passive components. However, both antennas and filters are usually larger compared to other components in communication systems. To reduce the circuit size, we designed a single circuit module to provide both the filtering and radiation performances. |
In this thesis, a dual-band filtering antenna operated at 2.45/5.2 GHz is proposed. The proposed filtering antenna is composed of a dual-band antenna and three stages of half-wavelength stepped-impedance resonators. To successfully develop the dual-band filtering antenna, a four pole dual-band band-pass filter and a dual-band monopole antenna are designed first. The dual-band monopole antenna has two paths for antenna to resonate at 2.45GHz and 5.2GHz. The four pole band-pass filter has two pass bands and multiple transmission zeros at the edge of band and it can suppress interference noise from outer band effectively. By properly adding the interdigital capacitor structure between the third resonator and ground, good impedance matching can be achieved.
Multiple-input multiple-output (MIMO) wireless communication has also become an important technology now. The antenna element in this thesis is further applied to MIMO antenna communication system. A resonator in the ground is designed to enhance the isolation of the MIMO antennas. Antenna parameters are measured and the experimental results are given and discussed in this thesis.
Key words: filtering antenna、dual-band、band-pass filter、stepped impedance resonator、MIMO
||Chih-Wen Kuo - chair|
Chen-Chao Wang - co-chair
Lih-Tyng Hwang - co-chair
Ken-Huang Lin - advisor
Indicate in-campus at 1 year and off-campus access at 1 year.|
|Date of Submission