Frontiers of Information Technology & Electronic Engineering
>> 2021,
Volume 22,
Issue 9
doi:
10.1631/FITEE.2000292
A microstrip filter direct-coupled amplifier based on active coupling matrix synthesis
Affiliation(s): School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China; School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China; CTTL-System Laboratory, China Academy of Information and Communications Technology, Beijing 100191, China; National Physical Laboratory, Teddington TW11 0LW, UK; less
Received: 2020-06-16
Accepted: 2021-09-10
Available online: 2021-09-10
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Abstract
This paper presents a methodology of designing an integrated with a filter using an active . The filter is directly coupled to the active device, and the integrated filter can achieve filtering as well as matching functionalities, simultaneously, eliminating the need for separate matching networks. The filter is represented by an active , with additional columns and rows in the matrix corresponding to the active transistor. The matrix can be used to calculate the S-parameter responses (i.e., the return loss and the gain) and the initial dimensions of the integrated device. Moreover, the integration of a filter and an leads to a reduced loss and a more compact architecture of the devices. An X-band filter has been designed and demonstrated as an example. technology has been chosen because of its appealing advantages of easy fabrication, low cost, and most importantly, easy integration with active devices.
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