Dual-Band Balanced Bandpass Filter Using Slotlines Loaded Patch Resonators With Independently Controllable Bandwidths

High‐performance balanced dual‐band bandpass filter with controllable bandwidth and frequency ratio

“…Dual-band bandpass filters (BPFs) provide the capability to separate and isolate two specific frequency bands of interest, which can allow for targeted signal processing or analysis in each band, enabling efficient utilization of the available frequency spectrum. To improve the anti-interference capability of dual-band filter, a diverse assortment of balanced dual-band filters in studies [1][2][3][4][5][6][7][8][9][10][11] have been widely investigated in terms of their ability to selectively pass through two specific frequency bands and attenuate other interfering bands while achieving common-mode (CM) noise suppression. For instance, dielectric resonators, 1 defected ground structures, 2 and slotline-loaded patch resonators 3,4 can be utilized in constituting balanced dualband BPFs.…”

Design of dual‐band balanced bandpass filter based on a single substrate integrated waveguide cavity

“…In modern wireless communication system, balanced circuits are widely utilized due to their strengths of noise suppression and low electromagnetic interference 1,2 . Among them, balanced bandpass filters (BPFs) have been much researched based on different transmission structures, such as microstrip 3,4 and patch 5 in the last few years. Specifically, a planar balanced BPF consists of a direct BPF branch with virtually short‐ended stubs under DM operation 3 .…”

“…4 In Ref. [5], patch resonators and meandered slotlines (MSLs) are utilized to construct a novel dual-band balanced BPF. Unfortunately, although these structures can achieve good CM suppression, they suffer from high insertion loss and radiation when operating at high frequencies.…”

A Balanced Tri-Band Substrate Integrated Waveguide Bandpass Filter With High Selectivity

“…In recent years, balanced circuits are widely used because of their ability of noise suppression and low electromagnetic interference [1]. Specially, balanced bandpass filters (BPFs) with different transmission structures, such as microstrip [2,3] and patch resonator [4] have attached much attention recently [2]. presents a new fourth-order balanced dual-band bandpass filter (BPF) based on four coupled bi-section half-wavelength (λ/2) stepped-impedance resonators (SIRs) [3].…”

“…presents a balanced filter by centrallyloaded half-wavelength resonator. In [4], a novel dual-band balanced BPF is constructed based on patch resonators and meandered slotlines (MSLs). Unfortunately, at high frequencies, these structures which can achieve good CM suppression suffer from high insertion loss and radiation.…”