Realization of Rectangular Frequency Characteristics by the Effects of a Low-Noise Amplifier and Flat Passband Bandpass Filter

Tomohiro TSUKUSHI; Satoshi ONO; Koji WADA

doi:10.1587/transele.2021MMP0007

Realization of Rectangular Frequency Characteristics by the Effects of a Low-Noise Amplifier and Flat Passband Bandpass Filter

Tomohiro TSUKUSHI, Satoshi ONO, Koji WADA

Full Text Views

0

Share
Cite this

Summary :

Realizing frequency rectangular characteristics using a planar circuit made of a normal conductor material such as a printed circuit board (PCB) is difficult. The reason is that the corners of the frequency response are rounded by the effect of the low unloaded quality factors of the resonators. Rectangular frequency characteristics are generally realized by a low-noise amplifier (LNA) with flat gain characteristics and a high-order bandpass filter (BPF) with resonators having high unloaded quality factors. Here, we use an LNA and a fourth-order flat passband BPF made of a PCB to realize the desired characteristics. We first calculate the signal and noise powers to confirm any effects from insertion loss caused by the BPF. Next, we explain the design and fabrication of an LNA, since no proper LNAs have been developed for this research. Finally, the rectangular frequency characteristics are shown by a circuit combining the fabricated LNA and the fabricated flat passband BPF. We show that rectangular frequency characteristics can be realized using a flat passband BPF technique.

Publication: IEICE TRANSACTIONS on Electronics Vol.E104-C No.10 pp.568-575

Publication Date: 2021/10/01

Publicized: 2021/04/09

Online ISSN: 1745-1353

DOI: 10.1587/transele.2021MMP0007

Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technologies)

Category

Authors

Tomohiro TSUKUSHI
  the University of Electro-Communications
Satoshi ONO
  the University of Electro-Communications
Koji WADA
  the University of Electro-Communications

Keyword

bandpass filter (BPF), flat passband BPF, low noise amplifier (LNA), rectangular frequency characteristics

Cite this

Copy

Tomohiro TSUKUSHI, Satoshi ONO, Koji WADA, "Realization of Rectangular Frequency Characteristics by the Effects of a Low-Noise Amplifier and Flat Passband Bandpass Filter" in IEICE TRANSACTIONS on Electronics, vol. E104-C, no. 10, pp. 568-575, October 2021, doi: 10.1587/transele.2021MMP0007.
Abstract: Realizing frequency rectangular characteristics using a planar circuit made of a normal conductor material such as a printed circuit board (PCB) is difficult. The reason is that the corners of the frequency response are rounded by the effect of the low unloaded quality factors of the resonators. Rectangular frequency characteristics are generally realized by a low-noise amplifier (LNA) with flat gain characteristics and a high-order bandpass filter (BPF) with resonators having high unloaded quality factors. Here, we use an LNA and a fourth-order flat passband BPF made of a PCB to realize the desired characteristics. We first calculate the signal and noise powers to confirm any effects from insertion loss caused by the BPF. Next, we explain the design and fabrication of an LNA, since no proper LNAs have been developed for this research. Finally, the rectangular frequency characteristics are shown by a circuit combining the fabricated LNA and the fabricated flat passband BPF. We show that rectangular frequency characteristics can be realized using a flat passband BPF technique.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.2021MMP0007/_p

Copy

@ARTICLE{e104-c_10_568,
author={Tomohiro TSUKUSHI, Satoshi ONO, Koji WADA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Realization of Rectangular Frequency Characteristics by the Effects of a Low-Noise Amplifier and Flat Passband Bandpass Filter},
year={2021},
volume={E104-C},
number={10},
pages={568-575},
abstract={Realizing frequency rectangular characteristics using a planar circuit made of a normal conductor material such as a printed circuit board (PCB) is difficult. The reason is that the corners of the frequency response are rounded by the effect of the low unloaded quality factors of the resonators. Rectangular frequency characteristics are generally realized by a low-noise amplifier (LNA) with flat gain characteristics and a high-order bandpass filter (BPF) with resonators having high unloaded quality factors. Here, we use an LNA and a fourth-order flat passband BPF made of a PCB to realize the desired characteristics. We first calculate the signal and noise powers to confirm any effects from insertion loss caused by the BPF. Next, we explain the design and fabrication of an LNA, since no proper LNAs have been developed for this research. Finally, the rectangular frequency characteristics are shown by a circuit combining the fabricated LNA and the fabricated flat passband BPF. We show that rectangular frequency characteristics can be realized using a flat passband BPF technique.},
keywords={},
doi={10.1587/transele.2021MMP0007},
ISSN={1745-1353},
month={October},}

Copy

TY - JOUR
TI - Realization of Rectangular Frequency Characteristics by the Effects of a Low-Noise Amplifier and Flat Passband Bandpass Filter
T2 - IEICE TRANSACTIONS on Electronics
SP - 568
EP - 575
AU - Tomohiro TSUKUSHI
AU - Satoshi ONO
AU - Koji WADA
PY - 2021
DO - 10.1587/transele.2021MMP0007
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E104-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 2021
AB - Realizing frequency rectangular characteristics using a planar circuit made of a normal conductor material such as a printed circuit board (PCB) is difficult. The reason is that the corners of the frequency response are rounded by the effect of the low unloaded quality factors of the resonators. Rectangular frequency characteristics are generally realized by a low-noise amplifier (LNA) with flat gain characteristics and a high-order bandpass filter (BPF) with resonators having high unloaded quality factors. Here, we use an LNA and a fourth-order flat passband BPF made of a PCB to realize the desired characteristics. We first calculate the signal and noise powers to confirm any effects from insertion loss caused by the BPF. Next, we explain the design and fabrication of an LNA, since no proper LNAs have been developed for this research. Finally, the rectangular frequency characteristics are shown by a circuit combining the fabricated LNA and the fabricated flat passband BPF. We show that rectangular frequency characteristics can be realized using a flat passband BPF technique.
ER -