Dual-Band Differential Filter Using Broadband Common-Mode Rejection Artificial Transmission Line

Abstract

Abstract-A new balanced dual-band bandpass filter with strong common-mode rejection is presented in this paper. Common-mode rejection is provided by a section of a periodic microstrip differential line that behaves as a low-pass filter under common-mode operation. In contrast, the differential line exhibits very good all-pass behavior under differential mode operation. This structure is combined with a differential dual-band bandpass filter based on embedded resonators. Simulations and experiments confirm that the combined structure has good common-mode rejection within the passbands of the dual-band differential filter.

Common-Mode Suppression Design for Gigahertz Differential Signals Based on C-Slotline

“…due to the application of periodic structure. For the multilayer common-mode filters (based on the metamaterial transmission line [3] and the hybrid structure of meandered signal pair and an improved mushroom-type cell [7], and LPC technology [9]), this work shows a good compromise between the common-mode suppression, design complexity and fabrication cost.…”

“…The common-mode suppression behavior is also investigated based on planar electromagnetic bandgap structures by Orlandi et al in [8]. Besides, the artificial transmission line [9] and the multilayer liquid crystal polymer technology [10] are used in the common-mode suppression as well, and the balanced bandpass filters based on them are successfully designed.…”

“…Compared with the previous work [1,2,6] which all implemented on 2-layer PCB, the proposed structure has the smallest electric size as well as the maximum fractional bandwidth. Moreover, the proposed common-mode filter has the advantages of simple configuration design in contrast to the previous design in [2,3,[6][7][8][9]. This paper is organized as follows.…”

Enhancing common‐mode suppression in microstrip differential lines by means of chirped and multi‐tuned electromagnetic bandgaps

“…However, the suppression of the common‐mode in such differential lines is a due, at least in the frequency region of interest, since there are several sources of common‐mode noise. Many types of common‐mode suppressed differential lines have been reported in the literature . In most of these lines, the common‐mode is suppressed by etching patterns in the ground plane.…”

Effects of the Inductive Port of Blumlein Transmission Line on the Reflection and Transmission Characteristics of Electromagnetic Waves

“…Transmission line (TL) is an important device for guiding and propagating electromagnetic waves in a special band, and it has been widely used in communications [1,2], pulse modulation and signal measurement [3][4][5][6], microwave technology [7][8][9][10] and pulsed power technology [11][12][13][14][15]. Every TL has its own characteristic impedance, and the impedance of a dispersive TL changes in line with the work frequency [15,16].…”