Design of MIMO Antennas for B4G / 5G Communication Devices

Autor: CHEN, CHENG-WEI, 陳政瑋
Rok vydání: 2018
Druh dokumentu: 學位論文 ; thesis
Popis: 106
In this thesis, the subjects focuses on the MIMO antennas for B4G / 5G Communication Devices. Two kinds of antenna for tablet computer and laptop computer are proposed, All the antenna have multi-frequency operation. The antenna design principle is built on the slot antenna, monopole antenna, inverted F antenna and dipole antenna, which integrates matching circuit to excite the LTE / GSM / WWAN / WLAN and 5th generation bands. The first design use open slot antenna for the tablet computer with metal casing in proposed. The antenna is used a cross-slot feed to create dual bnad to cover LTE full bands. The B4G band antennas are set on both long side of the structure and using a matching circuit to improve the operating bandwidth. There are two different feeding ports for low band (698 ~ 960 MHz), middle band (1710 ~ 2690 MHz),high band (3300 ~ 3600 MHz), 5th generation bands (4800 ~ 5000 MHz) and WLAN (5150 ~ 5875 MHz). The second design uses two ports to connect the metal cover for laptop computer. Antenna used low-pass and bass-pass filter circuit to reduce the isolation of the two ports. the antenna operates at low band (698 ~ 960 MHz), middle band (1710 ~ 2690 MHz).The third design for laptop computer with low profile of ground radiation antenna. The antenna uses CPW fed mechanism to excite the current from the metal ground. Then adding a capacitive element to adjust the impedance matching. This antenna will not be connecting to the system ground, and it can be used in the hinge. The antenna operates at 5th generation bands (4800 ~ 5000 MHz) and WLAN (5150 ~ 5875 MHz). Finally, studied the position of the antenna, and the parameters (ECC、Channel Capacity) in the MIMO system are discussed. Finally, we consider the user's habits, the impacts of the antenna.
Databáze: Networked Digital Library of Theses & Dissertations
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