Quasi-Lumped Design of Uwb BPF Using Suspended Stripline

Abstract

We propose a novel UWB bandpass filter (BPF) design using the suspended stripline (SSL). The filter composes of a low-pass and a high-pass circuit, both implemented by SSL structures. A notch response structure might be implemented to the filter by embedding a resonant slotline.The quasi-lumped elements circuit models were developed to analyze these circuits' performance. Experiments were conducted, and good agreements were observed between the measurements and simulations.

A New Design Method for Ultrawideband Microstrip-to-Suspended Stripline Transitions

“…(2) SSL provides wide impedance ranges because the width of SSL's strip is wider than MSL under the same characteristic impedance. (3) Since the SSL substrate is suspended at the center of a rectangular waveguide, it is easy to design a capacitance overlapped by top and bottom strips, enabling it to implement high-performance ultrawideband filters [2][3][4][5][6]. (4) Due to the shielded structure, radiation leakage is minimized.…”

Suspended Substrate Stripline Bandpass Filters With Source-Load Coupling Structure Using Lumped and Full-Wave Mixed Approach

“…In the past, lumped-element circuit models were presented mainly for comprehension purpose, not suitable for the circuit's physical layout design [12][13][14]. The circuit layout as well as the structural dimensions was still determined by full-wave simulations, requiring a considerable computational resource.…”