Antipodal fin-line waveguide to substrate integrated waveguide transition
17 Jun 2012-pp 1-3
TL;DR: In this paper, a simple and robust transition of substrate integrated waveguide (SIW) to rectangular waveguide is presented, based on a tapered fin-line, which is designed for dielectric substrate having a relative permittivity higher than 4.
Abstract: Presented in this paper is a simple and robust transition of substrate integrated waveguide (SIW) to rectangular waveguide. Based on a tapered fin-line, this transition is designed for dielectric substrate having a relative permittivity higher than 4. It is fabricated using a standard printed circuit board (PCB) process and inserted in the waveguide without modification to the waveguide dimensions. The robustness of the transition with reference to the relative position error is studied showing excellent stability. Measurement results of a back-to-back transition show excellent performance in a bandwidth of 6% (33–35 GHz) with less than 1 dB of insertion loss and a return loss of better than 15 dB. This low loss and small size transition can be used in the development of microwave and millimeter wave circuits.
Citations
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01 Jan 2015
73 citations
Proceedings Article•
23 Dec 2013
TL;DR: In this paper, a wideband low loss tapered antipodal fin-line waveguide-to-microstrip transition operating in the 63-90 GHz frequency band is presented.
Abstract: In this paper design of a wideband low loss tapered antipodal fin-line waveguide-to-microstrip transition operating in the 63-90 GHz frequency band is presented. The transition structure consists of a metal body containing a standard WR12 waveguide and a printed circuit board (PCB) with tapered antipodal fin-line fabricated using standard high frequency PCB technology Rogers RO4003C. The transition is realized by clamping the PCB between two halves of the metal body. All parameters of the designed transition are optimized for superior performance in the 71-86 GHz band that is dedicated for backhaul systems of mobile networks. Measurement results of the designed waveguide-to-microstrip transition show that it provides a large transmission bandwidth of 63-90 GHz (> 27 GHz) for the 10 dB level of return loss. The measured average insertion loss is about 0.6 dB in the 71-86 GHz frequency band and is lower than 1.1 dB in all the E-band from 60 GHz to 90 GHz. Hence, the achieved characteristics are sufficient for use the designed transition in various E-band applications such as WLAN/WPAN communications, 71-76/81-86 GHz wireless backhaul systems, and 77 GHz automotive radars.
12 citations
Cites background from "Antipodal fin-line waveguide to sub..."
...Later in [5-6] their modifications were presented for frequencies up to 48 GHz....
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TL;DR: In this article, a design approach for substrate-integrated waveguide to rectangular waveguide (RWG) transitions based on the synthesis of antipodal finline tapers is proposed.
Abstract: A design approach for substrate-integrated waveguide (SIW) to rectangular waveguide (RWG) transitions based on the synthesis of antipodal finline tapers is proposed. The taper is designed using a reflection-based impedance definition as no suitable model is available for antipodal finlines. The characteristics of the finline are determined from full-wave simulation. To demonstrate the proposed method, two SIW-to-RWG transitions are designed and characterized at the $K$ -band. The measured back-to-back transitions exhibit a return loss above 15 dB and an insertion loss below 1 dB between 16.7 and 20.5 GHz and between 21.1 and more than 31 GHz, respectively. A good agreement between the synthesis model and full-wave simulation of the taper on one hand and between simulation and measurements of back-to-back transitions on the other hand is demonstrated.
9 citations
Cites methods from "Antipodal fin-line waveguide to sub..."
...In [19], an example for such a transition using a linear taper is presented....
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TL;DR: In this paper, a new Ka band microstrip to waveguide transition with combination of electric and magnetic coupling is introduced by using a quasi-triangle structure, and the length of the proposed transition has been significantly diminished.
Abstract: In this article, a new Ka band microstrip to waveguide transition with combination of electric and magnetic coupling is introduced by using a quasi-triangle structure. Consequently, the length of the proposed transition has been significantly diminished. A back-to-back prototype was fabricated based on the optimized dimensions to validate the design concept. The measured and simulated results are in a good alignment. The experimental results show that the return loss is better than 14.8 dB across the frequency range of 32-40 GHz with an insertion loss of lower than 0.9 dB. The conversion efficiency for the single transition, therefore, is larger than 90.5%. Because of its broad operation bandwidth, low insertion loss, and compact size, the proposed embedded transition could find wide applications in most modern miniaturized MMIC devices and systems.
2 citations
TL;DR: The constraints and solutions for the aforementioned combination of SHF microwave and light are discussed, including considerations of the light distribution and the obtained power as a function of the incident angle and the used polymer optical fiber diameter.
Abstract: This paper presents a hybrid antenna design for an optically powered super high frequency (SHF) radio frequency identification transponder applicable for the integration into metal. The key feature of the antenna is its ability to receive microwave signals at SHF for data communication and optical signals for the power supply of the transponder. The antenna design is based on a circular waveguide which is filled with a bundle of polymer optical fibers to guide light to the photodiodes. In addition, a transition is placed within the circular waveguide to transfer the waveguide mode of the SHF signal into a microstrip mode which is a more suitable structure for the integration of electronic transponder components. This paper discusses the constraints and solutions for the aforementioned combination of SHF microwave and light. The figures of merit of the optical power supply are presented, including considerations of the light distribution and the obtained power as a function of the incident angle and the used polymer optical fiber diameter. Furthermore, the measured gain and return loss of the SHF antenna structure is compared to the simulated results.
1 citations
References
More filters
TL;DR: In this paper, the dispersion properties of the substrate integrated rectangular waveguide (SIRW) were rigorously obtained using the BI-RME method combined with the Floquet's theorem.
Abstract: Dispersion properties of the substrate integrated rectangular waveguide (SIRW) are rigorously obtained using the BI-RME method combined with the Floquet's theorem. Our analysis shows that the SIRW basically has the same guided-wave characteristics as the conventional rectangular waveguide. Empirical equations are derived from the calculated dispersion curves in order to estimate the cutoff frequency of the first two dominant modes of the SIRW To validate the analysis results, an SIRW guide was designed and measured. Very good agreements between the experimental and theoretical results were obtained.
776 citations
"Antipodal fin-line waveguide to sub..." refers background in this paper
...To preserve these advantages when dealing with conventional waveguide techniques, a waveguide-to-SIW transition must be made with one single substrate and eliminate any mechanical assembling [1][2]....
[...]
23 May 2010
TL;DR: In this paper, the microstrip-to-substrate integrated waveguide (SIW) transition is decomposed in two distinct parts, i.e., microstrip taper and SIW step.
Abstract: This paper presents design equations for the microstrip-to-Substrate Integrated Waveguide (SIW) transition. The transition is decomposed in two distinct parts: the microstrip taper and the microstrip-to-SIW step. Analytical equations are used for the microstrip taper. As for the step, the microstrip is modeled by an equivalent transverse electromagnetic (TEM) waveguide. An equation relating the optimum microstrip width to the SIW width is derived using a curve fitting technique. It is shown that when the step is properly sized, it provides a return loss superior to 20 dB. Three design examples are presented using different substrate permittivity and frequency bands between 18 GHz and 75 GHz. An experimental verification is also presented. The presented technique allows to design transitions covering the complete single-mode SIW bandwidth.
286 citations
"Antipodal fin-line waveguide to sub..." refers background in this paper
...To preserve these advantages when dealing with conventional waveguide techniques, a waveguide-to-SIW transition must be made with one single substrate and eliminate any mechanical assembling [1][2]....
[...]
01 Jan 2010
231 citations
Journal Article•
TL;DR: In this paper, a new model for the prediction of the resonant frequencies created by antipodal finline waveguide to microstrip transitions is presented, where the transition is modeled as a tapered transmission line in series with an infinite set of coupled resonant circuits.
Abstract: A new model is presented which permits the prediction of the resonant frequencies created by antipodal finline waveguide to microstrip transitions. The transition is modeled as a tapered transmission line in series with an infinite set of coupled resonant circuits. The resonant circuits are modeled as simple microwave resonant cavities of which the resonant frequencies are easily determined. The model is developed and the resonant frequencies determined for several different transitions. Experimental results are given to confirm the models.
188 citations
"Antipodal fin-line waveguide to sub..." refers background in this paper
...In general, a typical transition to microstrip line is subject to the problem of resonance [8]....
[...]
TL;DR: In this paper, an open-structure eigenvalue problem of substrate integrated waveguide (SIW) cavity structures is investigated in detail by using a finite-difference frequency-domain method, and the quality (Q) factor of such SIW cavities is given.
Abstract: An open-structure eigenvalue problem of substrate integrated waveguide (SIW) cavity structures is investigated in detail by using a finite-difference frequency-domain method, and the quality (Q) factor of such SIW cavities is given. Based on the concept of a defected ground structure, a new class of SIW cavity bandpass filters are designed, fabricated, and measured around 5.8 GHz. With their fabrication on standard printed circuit boards, such filters present the advantages of high-Q factor, high power capacity, and small size. Simulated and measured results are presented and discussed to show promising performances of the proposed filters.
176 citations