Coaxial-line feed for post-wall waveguide in millimeter wave band

Kai, Tomoaki; Hirokawa, Jiro; Ando, Makoto; Nakano, Hiroshi; Hirachi, Yasutake

doi:10.1109/aps.2005.1551399

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…The proposed structure is shown in Figure 4. This transition is similar to the one presented in [17] for millimeter-wave band. The diameter of center pin of the 50 X connector is 1.27 mm and its outer diameter is 4.1 mm.…”

Section: Coaxial-to-pcb-wg Transitionsupporting

confidence: 73%

“…The diameter of this coupling vias is relevant only in as much as ensuring a good 50-X match. Similar transitions were introduced in [12,17] for the millimeterwave band. However, in the present structure, no extra posts were used to suppress the reflections and the transition shown in Figure 7 could provide acceptable impedance matching.…”

Section: E Pcb-wg-to-microstrip T-junctionmentioning

confidence: 89%

“…The SMA connector is located at approximately k g /4 away from the shorted end of the waveguide where k g is the guide wavelength at 12.5 GHz. For the geometry chosen in this work, electromagnetic simulations as well as measurements of a test structure proved that at 12.5 GHz there was no need for reflection canceling posts in proximity of the coaxial connector as suggested in [17] and acceptable return loss of better than 24 dB could be achieved over 12-13 GHz range. The transmission loss of the coaxial-to-PCBWG junction alone was estimated to be 0.07 dB.…”

Section: Coaxial-to-pcb-wg Transitionmentioning

confidence: 92%

See 2 more Smart Citations

High frequency integrated feed for front end circuitry and antenna arrays

Busuioc

Safavi‐Naeini

Shahabadi

2008

Int J RF and Microwave Comp Aid Eng

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Low-cost printed circuit board waveguide (PCBWG) technology is employed to develop new waveguide-fed microstrip antenna arrays with low profile and light weight while maintaining high efficiency and gain at 12.5 GHz. The proposed corporate feed network has two parts: on the antenna layer, microstrip lines are used to form a 2 3 4 sequentially rotated sub-array of circularly polarized microstrip patches and on the feed layer PCB-WG is utilized to combine any number of these sub-arrays to form a larger array. Because PCB-WGs transmit the power over a large portion of the feed network, losses are substantially reduced and spurious radiations from feed circuit are eliminated. Several microstrip arrays with PCBWG feed were designed and fabricated using standard PCB process. Comparing the results with those of a hybrid array with conventional waveguide feed shows that there is only a negligible degradation in gain and efficiency when bulky and expensive aluminum waveguides are replaced by PCB-WGs.

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Section: Coaxial-to-pcb-wg Transitionsupporting

confidence: 73%

Section: E Pcb-wg-to-microstrip T-junctionmentioning

confidence: 89%

Section: Coaxial-to-pcb-wg Transitionmentioning

confidence: 92%

See 1 more Smart Citation

High frequency integrated feed for front end circuitry and antenna arrays

Busuioc

Safavi‐Naeini

Shahabadi

2008

Int J RF and Microwave Comp Aid Eng

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“…Sizes of via pads between different layers are adjusted to achieve better impedance matching. Three different designs have also been investigated and their performances are compared [Kai et al, 2005]. However, it deserves mentioning that the thickness of SIW is much smaller than that of the metallic waveguide.…”

Section: Wwwintechopencommentioning

confidence: 99%

Design and Modeling of Microstrip Line to Substrate Integrated Waveguide Transitions

Huang¹,

Shen²,

Wu³

2010

Passive Microwave Components and Antennas

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“…A great many of transitions from other planar transmission lines to SIW have been investigated theoretically and experimentally, such as microstrip to SIW [2], [5], [6], coupled microstrip (CMS) to SIW [6], coplanar waveguide (CPW) to SIW [8], [9], grounded CPW to SIW [10], [11], coplanar stripline (CPS) to SIW [12], [13], and even the slot line to SIW [14]- [16]. All above-mentioned transitions are designed for the dominant mode of the SIW, namely, the mode or mode.…”

Section: Introductionmentioning

confidence: 99%

Wideband Excitation Technology of <formula formulatype="inline"><tex Notation="TeX">${\rm TE}_{20}$</tex></formula> Mode Substrate Integrated Waveguide (SIW) and Its Applications

Wu¹,

Liu

Xue³

2015

IEEE Trans. Microwave Theory Techn.

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The higher order mode substrate integrated waveguide (SIW) has advantages in the applications, which are: 1) simplifying the structure with reduced fabrication cost and 2) enhancing the stability of performance by relaxed fabrication tolerance. In this paper, two wideband mode excitation structures are presented and investigated for the SIW. A slot along the mid line in the longitudinal direction of the SIW is employed to convert the electromagnetic field pattern between slotline and the mode SIW. The second structure is based on the slot aperture coupling and can realize wideband direct transition between the mode SIW and microstrip line. Both transitions have a simple and compact structure, as well as broadband characteristics. The wideband transition performance is demonstrated in this paper. As application examples of the transitions, two broadband substrate integrated baluns are presented and fabricated based on the mode excitation structures and mode characteristics. The 180 out-of-phase and equal magnitude of the balun outputs in a wide frequency range can be achieved inherently. The balun based on the slotline excitation has a fractional bandwidth of 50.2%, from 7.3 to 12.2 GHz, with measured return loss, amplitude imbalance, and phase imbalance better than 10 and 0.45 dB and 3.8 . The balun based on the aperture coupling excitation shows a fractional bandwidth of 50.3%, from 7 to 11.7 GHz, with measured return loss, insertion loss, amplitude imbalance, and phase imbalance better than 10, 1, and 0.27 dB and 2.4 , respectively. Both baluns not only show good performance, but also demonstrate the existence of the mode in the SIW.

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Coaxial-line feed for post-wall waveguide in millimeter wave band

Cited by 6 publications

References 3 publications

High frequency integrated feed for front end circuitry and antenna arrays

High frequency integrated feed for front end circuitry and antenna arrays

Design and Modeling of Microstrip Line to Substrate Integrated Waveguide Transitions

Wideband Excitation Technology of <formula formulatype="inline"><tex Notation="TeX">${\rm TE}_{20}$</tex></formula> Mode Substrate Integrated Waveguide (SIW) and Its Applications

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