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Abstract
This paper proposes a DTV/LTE antenna design without physical structure for laptop computers. By changing the laptop’s right revolving axis to a non-conductor material and exciting several dipoles and loop paths formed by the display, keyboard ground plane and metal revolving axis using a feed matching circuit at an appropriate position of the slot on the hinge to cover the frequency bands for DTV (470–862 MHz) and LTE (698–960 MHz, 1710–2690 MHz). The feed matching circuit is fitted to the keyboard ground plane adjacent to the hinge. It consists of a 3.6 nH chip inductor and a 0.2 pF chip capacitor to improve the high frequency matching and increase the high frequency bandwidth. The antenna can cover the frequency bands required by DTV and LTE, and the measured antenna efficiency in the operational frequency band is also better than 50%.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Additional information
Notes on contributors
Shu-Chuan Chen
Shu-Chuan Chen received the B.S. and M.S. degrees in electrical engineering from National Defense University Chung Cheng Institute of Technology, Taoyuan, Taiwan, and the Ph.D. degree in electrical engineering from National Sun Yat-sen University, Kaohsiung, Taiwan, in 1998, 2004, and 2012, respectively. Since 2012 she has been an assistant professor in the department of electrical and electronic engineering, Chung Cheng Institute of Technology, National Defense University, (CCIT, NDU), Taoyuan, Taiwan, where she became an associate professor in 2016. She also holds over 20 patents, including US, Taiwan, and China patents. Her main research interests are in internal antennas for mobile communication devices.
Jo-Yen Nieh
Jo-Yen Nieh received his B.S. degrees in electrical engineering from National Defense University Chung Cheng Institute of Technology, Taoyuan, Taiwan in 2001 and the M.S and.Ph.D. degree in electrical and computer engineering department from Naval Postgraduate School, Monterey, California USA, in 2006 and 2014 respectively. He has been an Assistant Professor with the Department of Electrical and Electronic Engineering, CCIT, NDU at 2015. The current research interests include radar waveform design and antenna applications.
Wei-Hsiang Liao
Wei-Hsiang Liao received the B.S. in avionic engineering from the Department of Avionic Engineering, Air Force Academy, Kaohsiung, Taiwan, in 2013, and the M.S. degrees from National Defense University (CCIT, NDU), Taoyuan, Taiwan, in 2018. His current research interests include internal antennas for mobile communication devices.
Sheng-Min Li
Sheng-Min Li received the B.S. degrees in electrical engineering from the Chung Cheng Institute of Technology, National Defense University (CCIT, NDU), Taoyuan, Taiwan, in 2016. He is now working toward the Ph.D. degree at National Defense University (CCIT, NDU), Taoyuan, Taiwan. His current research interests include internal antennas for mobile communication devices.