Conference paper
Replicability of a Millimeter-Wave Microstrip Bandpass Filter using Parallel Coupled Lines
Goethe University Frankfurt1
Department of Electrical Engineering, Technical University of Denmark2
Electromagnetic Systems, Department of Electrical Engineering, Technical University of Denmark3
Technical University of Denmark4
Metro-Access and Short Range Systems, Department of Photonics Engineering, Technical University of Denmark5
Replicability of filters is critical especially at millimeter-wave (mm-wave) frequencies, as a manufacturing error of a few tens of microns can significantly shift the frequency response in this range and lumped elements are not available at these frequencies. In this paper, seven replicas of a mm-wave coupled-line 3rd order bandpass filter (BPF) are fabricated and measured under the same test conditions.
The filters are designed on a single lot 10 mil-thick Rogers RO4350B substrate. The smallest spacing is 109 μm and the smallest line width is 330 μm. Over seven replicas, the passband is from 34.8±0.2 to 38.1±0.1 GHz; the insertion loss is 3.44±0.32 dB; the typical return loss is 10.18±2.43 dB. The measurement results are in accordance with the EM simulation results.
They show that the reflection parameters are relatively sensitive to manufacturing tolerances and connector realization, while the transmission parameters are robust to fabrication variations. This demonstrates a satisfactory manufacturing replicability of microstrip BPF in the Ka-band (26.5-40 GHz), in the scope of radar system design.
Language: | English |
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Publisher: | IEEE |
Year: | 2019 |
Pages: | 1 - 3 |
Proceedings: | 2018 IEEE MTT-S Latin America Microwave Conference |
ISBN: | 1538673339 , 1538673347 , 9781538673331 and 9781538673348 |
Types: | Conference paper |
DOI: | 10.1109/LAMC.2018.8699012 |
ORCIDs: | Johansen, Tom Keinicke , Dong, Yunfeng and Cimoli, Bruno |
Band-pass filters Connectors Manufacturing Microstrip filters Microwave filters Radar imaging Rogers RO4350B substrate Substrates band-pass filters frequency 26.5 GHz to 40.0 GHz frequency 34.6 GHz to 38.2 GHz frequency response insertion loss lumped elements manufacturing error manufacturing replicability microstrip BPF microstrip bandpass filters microstrip filters millimeter-wave millimeter-wave microstrip bandpass filter noise figure 3.12 dB to 3.76 dB noise figure 7.75 dB to 12.61 dB parallel coupled line filters parallel coupled lines radar system design replicability size 109.0 mum size 330.0 mum smallest line width smallest spacing typical return loss