Proceedings ArticleDOI

# Design of a broadband coaxial to substrate integrated waveguide (SIW) transition

01 Nov 2013-pp 896-898
Abstract: In this paper, a novel design of broadband coaxial to substrate integrated waveguide (SIW) transition has been implemented. The difficulties to get impedance matching between SIW and excitation port especially for thin substrate has been investigated and design steps to overcome the problem has been discussed. A two port SIW section using back-to-back configuration of the proposed transition is designed to operate at X-band (8-12 GHz) and fabricated. The measured result shows a broad bandwidth (30%) and an insertion loss of 1.2 dB in the operating band.
Topics: Coaxial (54%), Port (circuit theory) (54%), Insertion loss (52%), Impedance matching (51%)
##### Citations
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Journal ArticleDOI
, Zheng Li1
Abstract: A novel kind of high-efficient leaky-wave antenna array based on substrate integrated waveguide is investigated for sidelobe suppression and multibeam generation. The antenna array is designed upon a previous work with two feeding ports, and a tapered radiating slot array introduced. This kind of structure enables the array to have not only the compact architecture and high efficiency, but also the multibeam radiation and low sidelobe level (SLL). Different beams are generated by feeding the array from different input ports, and the SLL is reduced by the tapered slot lengths. The array was fabricated and measured, and the results are consistent with that of simulation.

20 citations

Proceedings ArticleDOI
01 Dec 2015-
Abstract: In this paper, a novel excitation technique by a commercially available SMA connector is presented for the empty substrate integrated waveguide (ESIW). The SMA connector is directly connected to one end of the ESIW. A prototype back-to-back transition is designed and fabricated for X-band operation. Measurement results show that the insertion loss of the back-to-back transition is below 1 dB over 7.15 GHz to 12.5 GHz. Losses from the transition are studied in details. The transition has a compact dimension of 22 mm∗3.5 mm.

10 citations

### Cites background from "Design of a broadband coaxial to su..."

• ...Direct SMA to SIW transition with short circuited back wall has been reported in [5]-[6]....

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Proceedings Article
13 May 2015-
Abstract: In this paper, a novel transition from co-axial probe-to-substrate integrated waveguide (SIW) and from SIW-to-dielectric image line (DIL) is proposed in Ku-band (12–18 GHz). The proposed transition is designed on a single substrate and thus eliminates complex multi-layer fabrication process for implementation of dielectric image line two port network. The proposed design is simulated on Ansoft HFSS and exhibits wide bandwidth performance. For probe-to-SIW back-to-back transition, the relative bandwidth (−20dB) is 38.5% and for back-to-back transition from probe-to-SIW and from SIW-to-DIL, the relative bandwidth (−15dB) is 24.5%. The insertion loss is better than 3.2 dB throughout the operating bandwidth. Detailed studies on dimensions of the matching network is also discussed. The results are also verified by using CST Microwave Studio.

9 citations

### Cites background or methods from "Design of a broadband coaxial to su..."

• ...The transition from coaxial probe-to-SIW has been developed in [10], [11], [12]....

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• ...The transition designed in [12] has wide relative bandwidth but it is not suitable for thick substrate....

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• ...impedance of SIW section is given by [12] w PI Z a b Z ....

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• ...A similar equivalent circuit is also proposed in [12]....

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Journal ArticleDOI
Abstract: A new vertical guiding structure in low-temperature cofired ceramics (LTCC) substrates is proposed. This vertical LTCC integrated waveguide (V-LIW) allows transmitting signals and realizing components in the body of the LTCC substrate perpendicular to its surface. This vertical integration leads to considerable footprint reduction while opening the door to higher frequency coverage as well as easy implementation of $E$ -plane structures. Discontinuities in V-LIW and transitions between the proposed V-LIW and conventional horizontal guiding structures such as coplanar waveguides, standard rectangular waveguides, and substrate integrated waveguides are also introduced. Applications to the design of V-band and W-band filters, couplers, and power dividers are presented. Several prototypes are fabricated with measurement results showing a good agreement with simulation data.

9 citations

### Cites background from "Design of a broadband coaxial to su..."

• ...The operation mechanism of the proposed transition in the second part is based on the probe excitation of rectangular waveguides which is widely used in the design of coaxial-toconventional waveguides transitions [32], [33] and also more recently in CPW-to-SIW transitions [34], [35]....

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Journal ArticleDOI
Abstract: In this letter, a novel coaxial line to substrate integrated waveguide (SIW) broadband transition is presented The transition is designed by connecting the inner conductor of a coaxial line to an open-circuited SIW The configuration directly transforms the TEM mode of a coaxial line to the fundamental TE10 mode of the SIW A prototype back-to-back transition is fabricated for X-band operation using a 0508 mm thick RO 4003C substrate with dielectric constant 355 Comparison with other reported transitions shows that the present structure provides lower passband insertion loss, wider bandwidth and most compact The area of each transition is $008\lambda _{g}^{2}$ where $\lambda _{g}$ is the guided wavelength at passband center frequency of $f_{0}= 105$ GHz Measured 15 dB and 20 dB matching bandwidths are over 48% and 20%, respectively, at $f_{0}$

9 citations

### Cites background from "Design of a broadband coaxial to su..."

• ...In [11], a triangular slot improves the FBW to 30% at f0 = 10 GHz....

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• ...Similar SMA-to-SIW transitions using electric back wall are reported in [9]–[11]....

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##### References
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Journal ArticleDOI
Abstract: Usually transitions from microstrip line to rectangular waveguide are made with three-dimensional complex mounting structures. In this paper, a new planar platform is developed in which the microstrip line and rectangular waveguide are fully integrated on the same substrate, and they are interconnected via a simple taper. Our experiments at 28 GHz show that an effective bandwidth of 12% at 20 dB return loss is obtained with an in-band insertion loss better than 0.3 dB. The new transition allows a complete integration of waveguide components on substrate with MICs and MMICs.

1,479 citations

### "Design of a broadband coaxial to su..." refers background in this paper

• ...Many attempts to excite SIW using microstrip line or co-planar waveguide have been reported in recent years [3]-[5]....

[...]

Journal ArticleDOI
Abstract: Substrate-integrated waveguide (SIW) technology represents an emerging and very promising candidate for the development of circuits and components operating in the microwave and millimetre-wave region. SIW structures are generally fabricated by using two rows of conducting cylinders or slots embedded in a dielectric substrate that connects two parallel metal plates, and permit the implementation of classical rectangular waveguide components in planar form, along with printed circuitry, active devices and antennas. This study aims to provide an overview of the recent advances in the modelling, design and technological implementation of SIW structures and components.

944 citations

### "Design of a broadband coaxial to su..." refers background in this paper

• ...Several studies of implementing different microwave components using this technology have been reported in many literatures [2]....

[...]

Journal ArticleDOI
Abstract: A waveguide of new structure has been developed for millimeter-wave applications. The dielectric waveguide is constructed with sidewalls consisting of lined via-holes and edges of metallized planes. This structure can be manufactured by lamination techniques, so we refer to the waveguide as a "laminated waveguide". The laminated waveguide can be embedded in a substrate and is able to be wired in three dimensions. The transmission characteristics are evaluated using a glass-ceramic substrate of dielectric constant, /spl epsiv//sub r/=5, and loss, tan /spl delta/=0.0008. Insertion loss per unit length of the guide is estimated to be less than 0.5 dB/cm at 83 GHz. Furthermore, it was confirmed that the laminated waveguide is suitable to feeding lines for a small sized plane array antenna. By electromagnetic simulation, it has been confirmed that fundamental structures, such as bends, branches, power dividers, and interconnections between upper and lower layers can be realized with sufficient performances.

465 citations

### "Design of a broadband coaxial to su..." refers background in this paper

• ...In recent years, studies on substrate integrated waveguide (SIW) technology has attracted high interest among the researchers since it is very good candidate for high frequency microwave and millimeter-wave circuits [1]....

[...]

Proceedings ArticleDOI
, Ke Wu2
20 May 2001-
Abstract: Usual transitions between planar circuit and rectangular waveguide make use of 3-D complex mounting structures. Such an integration requires costly high precision mechanical alignment, In this paper, a new planar platform is developed in which a coplanar waveguide (CPW) and a rectangular waveguide are fully integrated on the same substrate, and they are interconnected via a simple transition. They can be built with a standard PCB process. Our experiments at 28 GHz show that an effective bandwidth of 7% at 15 dB return loss can easily be achieved. The CPW-to-waveguide transition allows for a complete integration of waveguide components on substrate with active components such as MMIC.

197 citations

Proceedings ArticleDOI
03 Apr 2012-
TL;DR: A novel ultra-wideband GCPW to SIW transition is developed that integrates the coupling slot and impedance transformer into one tapered coupling slot to achieve an ultra wide bandwidth.
Abstract: In this paper, a novel ultra-wideband GCPW to SIW transition is developed. The transition integrates the coupling slot and impedance transformer into one tapered coupling slot to achieve an ultra wide bandwidth. The tapered coupling slot converts the arbitrary impedance of the SIW to the GCPW port impedance. The vias were strategically located to suppress unwanted modes across the transition as well. The fabricated transition demonstrated over 10 GHz bandwidth with less than 0.4 dB insertion loss at X-band. Theoretical and experimental results are presented and compared with previously designed transitions.

51 citations

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