An improved broadband transition between microstrip and empty substrate integrated waveguide

Peng, Hao; Xia, Xin‐Lin; Dong, Jun; Yang, Tao

doi:10.1002/mop.30015

Cited by 27 publications

(47 citation statements)

References 10 publications

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“…4, which shows the good agreement between the simulation and the measurement, furthermore the low attenuation of the line ensures a good performance of this structure for different applications. [5] No 20 dB 0.3 dB CSIW [3] Yes 10 dB 3.5 dB SBFSS-SIW [6] Yes 12 dB 1 dB Conclusion: A novel DESIW has been designed and manufactured. Its good performance in the monomode range assures its usage for the design of several devices that require to apply a bias voltage to the whole line or to some parts of it.…”

Section: A New Decoupled Empty Substrate Integrated Waveguide Realizamentioning

confidence: 98%

New decoupled empty substrate integrated waveguide realisation

et al. 2017

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This work presents a novel Decoupled Empty Substrate Integrated Waveguide (DESIW), which enables AC/DC decoupling in any device that is integrated in it. The decoupling strategy is performed throughout a micro-milling square pattern of easy implementation that increases the insertion losses compared to the standard ESIW. However, the DESIW related losses are still tolerable, allowing the employment of the new periodic structure in many practical applications. In particular, it can be used for the design and manufacturing of reconfigurable devices which need a bias voltage on the whole device, or just on some of its particular areas. A broadband transition from DESIW to microstrip planar lines has been also successfully designed. The new line has been manufactured and measured.Introduction: The use of Substrate Integrated Waveguides (SIWs) has become common in many high frequency applications [1]. The main reasons are their high performance in terms of quality factor, and the ease of integration and manufacturing of devices made in that technology. The SIW technology has appeared in response to the emerging problem of integration of planar and non-planar circuits for high-frequency applications, since it allows the integration of waveguides on the same dielectric substrate used for the synthesis of planar transmission lines and circuits. The advantage of this scheme is clear: the whole circuit (planar circuits, transitions and waveguides) can be implemented by standard PCB techniques, as well as by any other standard planar manufacturing process.Although performance is better in terms of quality factor than other planar circuits, SIW is not yet comparable with waveguide technology. In order to approach to the quality factor of the waveguide, different lines of work are being established in order to remove the dielectric substrate, that provides significant losses. One of these strategies is based on the new Empty SIW (ESIW) transmission line [2], consisting in emptying, metallizing, and covering a planar substrate with a top and bottom metal cover. The structure is completed with a specific broadband transition from a microstrip line.The need for reconfigurable devices has also led to different strategies. Many of them include the possibility of introducing a DC bias voltage in the device, acting on an additional element that is capable of modifying its response.Obviously, this involves that the structure must be composed of more than one single conductor. This is not the case of a waveguide structure, which is completely closed on itself with a single conductor. The decoupling of waveguides has been tried in several ways. For example the Corrugated SIW (CSIW) [3] is a simple structure which provides similar results to the standard SIW case. Nevertheless both are supported on a dielectric substrate, thus having similar levels of insertion losses. In this letter, we propose DESIW as a potential alternative to all previous solutions.Decoupled Empty Substrate Integrated Waveguide: The Empty Substrate Integrated Wave...

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Section: A New Decoupled Empty Substrate Integrated Waveguide Realizamentioning

confidence: 98%

New decoupled empty substrate integrated waveguide realisation

et al. 2017

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“…This transition has proved to perform satisfactorily, but its performance can still be improved. Besides, for thin substrates, the optimum values of w ti and l t (see figure 1(a)) produce a very long and In [6] a new transition from microstrip to ESIW is presented. It is the same transition as the one presented in [1] (see figure 1(a)), but it includes an additional taper in the microstrip line (see figure 1(b)).…”

Section: Introductionmentioning

confidence: 99%

Improved Low Reflection Transition From Microstrip Line to Empty Substrate-Integrated Waveguide

Esteban

Belenguer

Sánchez

et al. 2017

IEEE Microw. Wireless Compon. Lett.

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Substrate integrated waveguides (SIW) maintain the advantages of planar circuits (low loss, low profile, easy manufacturing, integration in a planar circuit board), and improve quality factor of filter resonators. Empty substrate integrated waveguides substantially reduce the insertion losses because waves propagate through air instead of through a lossy dielectric. The first empty substrate integrated waveguide (ESIW) used a simple tapering transition that can not be used for thin substrates. A new transition has recently been proposed which includes a taper also in the microstrip line, not only inside the ESIW, and so it can be used for all substrates, although measured return losses are only 13 dB. In this work the cited transition is improved by placing via holes that prevent undesired radiation, as well as two holes that help to ensure good accuracy in the mechanization of the input iris, thus allowing very good return losses (over 20 dB) in the measured results. A design procedure, that allows the successful design of the proposed new transition, is also provided. A back to back configuration of the improved new transition has been successfully manufactured and measured.

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“…The first step of the design requires a proper microstrip to air filled SIW transition to feed the cavity. The transition is designed using the techniques described in refs . The taper transition width W(Y) decreases along the Y direction by following the relation given by Equation 1 with c = 2/L t .…”

Section: Antenna Designmentioning

confidence: 99%

“…The transition is designed using the techniques described in refs. 6,8 The taper transition width W(Y) decreases along the Y direction by following the relation given by Equation 1 with c = 2/L t . c is the rate at which the tapering is done.…”

Section: Antenna Designmentioning

confidence: 99%

“…However, the radiation beam only covers the forward region above the cutoff (broadside). To get the LWA having beams from the backward to forward scanning, metamaterials (Dirac LWA, composite righ/left-handed LWA) [4][5][6] or periodical units (periodical LWA) 7,8 are used in the fast-wave structures. The CRLH LWA is able to achieve continuous beams (including broadside) when the CRLH unit cell arrives at the balanced state 5,6 .…”

Section: Moitreya Adhikarymentioning

confidence: 99%

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