Robust Microstrip-to-Waveguide Transitions for Millimeter-Wave Radar Sensor Applications

Boukari, B.; Moldovan, E.; Affes, Sofiène; Wu, Ke; Bosisio, R.G.; Tatu, Serioja Ovidiu

doi:10.1109/lawp.2009.2016681

Cited by 16 publications

(14 citation statements)

References 7 publications

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“…The first section of length L 1 provides the same height as the excited LTCC layer, that is, h 1 = h SIW . We underline that, in contrast to [6], L 1 plays a substantial role in our design. It can be seen from Table 1 that L 1 is significantly below λ g /4 due to the gap and probe.…”

Section: Design Proceduresmentioning

confidence: 99%

“…Moreover, to keep the fabrication effort low, horizontal waveguides are preferred as they are straightforwardly milled into the lower and upper half of a metallic fixture. For this sake, the SIW is connected congruently with zero distance to the RWG by widening its width appropriately [6]. In practice, it is indispensible to insert the substrate into the RWG to avoid leaked waves.…”

Section: Introductionmentioning

confidence: 99%

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Two layer LTCC substrate integrated to rectangular waveguide transition and its application for millimeter‐wave LTCC characterization

Peters

Denidni

Tatu

2012

Micro & Optical Tech Letters

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In this letter, a new practical approach for designing a millimeter‐wave transition at 76.5 GHz from substrate integrated waveguide (SIW) line on two low temperature cofired ceramics (LTCC) layers to a rectangular waveguide is proposed. To the best of our knowledge, this is the first feasible planar solution to couple a top‐layer SIW exclusively. A very small probe is cut in both layers and inserted into a milled clearance in the metallic waveguide. Shrinkage tolerance is addressed in particular in our design procedure. In addition, multiple back‐to‐back transitions are milled into one fixture and applied to obtain the actual LTCC loss tangent and permittivity. The latter undergoes a strong dispersion. Fabricated circuits are optically analyzed and exhibit a higher shrinkage than expected. Simulation and measurement results show good performances in terms of reflection and transmission. With these features, the proposed solution is able to handle electrically large substrates of around 12λg. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2675–2679, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27167

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Section: Design Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two layer LTCC substrate integrated to rectangular waveguide transition and its application for millimeter‐wave LTCC characterization

Peters

Denidni

Tatu

2012

Micro & Optical Tech Letters

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“…The finline‐like configuration is adopted as the parallel transition in Reference The finline‐like configuration must be long enough to achieve impedance matching, which increases the size of the transition. Multistage impedance transformations are usually employed in the transition to obtain wideband impedance matching . However, these approaches usually put forward higher requirements for fabrication accuracy and possess large dimensions.…”

Section: Introductionmentioning

confidence: 99%

“…Multistage impedance transformations are usually employed in the transition to obtain wideband impedance matching. 17,18 However, these approaches usually put forward higher requirements for fabrication accuracy and possess large dimensions.…”

Section: Introductionmentioning

confidence: 99%

An inline waveguide‐to‐microstrip transition for wideband millimeter‐wave applications

Jin

Han

et al. 2019

Micro & Optical Tech Letters

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A low‐cost wide Ka‐band inline waveguide‐to‐microstrip transition is proposed, which facilities the integration of planar transmission lines with waveguide structures. By employing a circular patch above a wedge‐shaped cavity, the quasi‐TEM mode wave in the microstrip line can be transformed into the TE10 mode wave in the rectangular waveguide. A transition prototype in a back‐to‐back configuration is manufactured and experimentally tested. Measured results show that the return loss is greater than 13 dB from 28 to 38 GHz and the insertion loss remains less than 0.4 dB for the proposed single‐side transition. With the features of wideband, compact structure and easy integration, the proposed transition can be applied in the low‐loss and high‐integration millimeter‐wave systems.

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“…For example, the stepped ridged waveguide [11,12] uses a matching section in the waveguide part whereas in the radial-shaped probe [13] the matching section is made on the microstrip. Other possibilities are presented in [14] and [15] where matching sections in both media are considered. The first one obtains measured insertion loss of 1.1 dB in a 1 GHz bandwidth around 9 GHz whereas the last one works in a 6 GHz bandwidth around 77 GHz obtaining an insertion loss of 1 dB at this frequency.…”

Section: Introductionmentioning

confidence: 99%

An Inline Microstrip-to-Waveguide Transition Operating in the Full W-Band

Rebollo

Gonzalo

Ederra

2015

J Infrared Milli Terahz Waves

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An inline microstrip-to-waveguide transition covering the full W-Band is presented in this article. The verification of the simulation results has been carried out by means of a back-to-back transition measurement. Experimental results show good return losses above 15 dB in the entire W-Band and also low insertion losses. Specifically, the measured insertion losses are 0.71 dB at the central frequency of W-Band, i.e., 92.5 GHz, and below 1.1 dB in the full W-band.

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Robust Microstrip-to-Waveguide Transitions for Millimeter-Wave Radar Sensor Applications

Cited by 16 publications

References 7 publications

Two layer LTCC substrate integrated to rectangular waveguide transition and its application for millimeter‐wave LTCC characterization

Two layer LTCC substrate integrated to rectangular waveguide transition and its application for millimeter‐wave LTCC characterization

An inline waveguide‐to‐microstrip transition for wideband millimeter‐wave applications

An Inline Microstrip-to-Waveguide Transition Operating in the Full W-Band

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