Work

Design of a Compact Band‐Pass Filter With an Inclined Phase Shift

Year: 2025

Type: article

Abstract: This paper presents a design for a band‐pass filter (BPF) with a desired phase shift at the inclined frequency in the passband. This design is achieved by combining a right‐handed transmission line (RHTL), which exhibits positive phase propagation and works as a low‐pass filter (LPF), and a left‐handed transmission line (LHTL), which exhibits negative phase propagation and works as a high‐pass filter (HPF). The proposed BPF simultaneously realizes a desired frequency filtering and phase shifting by cascading proper unit cells of RHTL and LHTL. To verify our proposed idea, we designed four BPFs with similar passband frequencies but different phase delays at a certain frequency in the passband. In the actual experiment, phase delays of 0°, +90°, −90°, and 180° were used, and the phase deviations from the designed phase shift were less than 9.59° at 600 MHz for all four phase delays. The insertion losses were maintained below 1.31 dB. As the RHTL and LHTL were synthesized with lumped elements only, the circuit is compact and applicable to monolithic microwave integrated circuit design.

Source: International Journal of RF and Microwave Computer-Aided Engineering

DOI: 10.1155/mmce/6665820

Authors: Heeje Han, Soonwoo Park, Hongjoon Kim

Institutions: Kyungpook National University, Defense Agency for Technology and Quality

Language: English

Topic: Microwave Engineering and Waveguides

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,570

Funders: National Research Foundation, National Research Foundation of Korea