Fully Tunable Bandpass Filter With Wide Bandwidth Tuning Range and Switchable Single/Dual Band

被引：1

作者：

Li, Shuang ^{[1
]}

Li, Shengxian ^{[1
]}

Yuan, Jianrong ^{[1
]}

Liu, Jun ^{[1
]}

Shi, Man ^{[1
]}

机构：

[1] China Acad Space Technol Xian, Xian, Peoples R China

来源：

IEEE ACCESS | 2024年 / 12卷

关键词：

Resonator filters; Notch filters; Bandwidth; Switches; Resonant frequency; Resonators; Filter banks; Band-pass filters; Passband; Frequency measurement; Chebyshev approximation; Tunable circuits and devices; High pass filter; low pass filter; switchable single and dual band; tunable bandpass filter; varactor and PIN diode; CENTER FREQUENCY;

D O I：

10.1109/ACCESS.2024.3374333

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, a fully tunable bandpass filter (BPF) with three states of filtering (single passband state, dual passband state and all-off state) is proposed, the proposed fully tunable BPF is cascaded by a tunable low pass filter section (LP) and a tunable high pass filter section(HP). By introducing a switchable dual-mode notch in the passband, the proposed BPF is capable of operating in single, dual passband and all-off state, demonstrating high flexibility in working mode. Tunable LP and HP filters with 7-order generalized Chebyshev response are designed to improve the roll-off rate and out-of-band rejection level of the BPF. The measured results show that the bandwidth of the BPF can be tuned from 0.25GHz to 2.69GHz (10.8:1), and the center frequency can be tuned from 2.9GHz to 4.6GHz with constant absolute bandwidth of 1GHz. Besides, high rejection level of out-of-band is realized in all working mode. The high flexibility in working mode makes the proposed fully tunable BPF very attractive in carrier aggregation scenarios.

引用

页码：36577 / 36585

页数：9