Microstrip-Slot Coupler Design-Part II: Practical Design Aspects

Hoffmann, R.; Siegl, Johann

doi:10.1109/tmtt.1982.1131223

Cited by 12 publications

(4 citation statements)

References 6 publications

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“…An alternative approach to [10] is given in [13] to design a multioctave 4 : 1 compact 3-dB coupler with some modifications while a bigger slot below substrate is used, and also, both terminating slots and circular disc are eliminated to obtain UWB operation. Some 3-dB microstrip slot couplers are also suggested in [14] and [15] at 4-8 GHz range with simpler structures, but their bandwidth is narrower than [10] and [13]. A 3-10 dB coupler formed by two elliptically shaped microstrip lines is also suggested in [16] with selectable dimensions to achieve UWB performance in 3.1 to 10.6 GHz range.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Broadband Quadrature Hybrid Coupler With Phase Shifter

Soodmand¹,

Beach²,

Morris³

2021

PIER Letters

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A 3-dB compact hybrid coupler is presented in this paper in an ultra-wideband frequency range from 1.5 GHz to 3.2 GHz with 90 • phase deference between the two output ports. The proposed coupler is formed by two notched elliptically shaped microstrip lines and four phase shifters, which are broadside coupled through an elliptically shaped slot. A combination of impedance matching technique and structural modification then has been employed to increase coupler efficiency. The design is demonstrated assuming a 0.51-mm-thick Rogers RO4350B substrate. Results of simulation and measurements show that the designed device exhibits a coupling of 3 ± 1 dB across the aimed bandwidth. This ultra-wideband coupling is accompanied by smooth isolation in the order of better than 25 dB and return loss in the order of better than 17 dB. The manufactured device including microstrip ports and phase shifters occupy an area of 35 mm × 30 mm × 1.1 mm (0.27λ × 0.23λ × 0.009λ) which makes it a compact suitable device for UHF applications and measurements, specifically measuring and determining isolation in in-band full duplex transceivers, because of its smooth isolation versus frequency and ultra-wideband bandwidth.

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Section: Introductionmentioning

confidence: 99%

Miniaturized Broadband Quadrature Hybrid Coupler With Phase Shifter

Soodmand¹,

Beach²,

Morris³

2021

PIER Letters

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“…The advantages of terahertz wave should make it of high research implication in numerous fields [20]- [24]. In communication, terahertz wave exhibits higher frequency than millimeter wave terahertz wave, so terahertz wave can provide wider bandwidth and transmit more information when employed in communication [25]- [27].…”

Section: Introductionmentioning

confidence: 99%

Terahertz Band Propagation Characteristics of Coupling Multiconductor Transmission Lines in Multilayer Media

2019

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The study on terahertz radiators will not only boost the development of theoretical research, but also raise severe challenges to solid-state electronics and circuit technology. In the present paper, the transmission characteristics of microstrip-slot coupling structures are primarily studied in 1-3THz band.Based on the single-layer dielectric structure, a double-layer dielectric microstrip-slot coupling structure with air as one layer is presented. It is reported that adding air layer based on the single-layer structure helps reduce the loss. Besides, given the factors of Engineering processing, the structure of three-layer media is also proposed; it is found that the structure of three-layer media still has exhibits transmission loss when the engineering realization is satisfied. However, this study suggests that the loss of the three-layer structure is higher than that of the two-layer structure, whereas the effect is better than that of the single-layer structure.INDEX TERMS Terahertz, multilayer structure, transmission characteristics, odd mode, even mode.

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“…It was claimed that this could be the main factor to achieve an UWB performance. In another research, the microstrip‐slot 3‐dB coupler design rules proposed by Schiek [6] and Hoffmann and Siegl [7, 8] removed the capacitive disk underneath the slot. Unfortunately, the electrical performance of the proposed design was not as broad as presented by de Ronde [4] and Garcia [5].…”

Section: Introductionmentioning

confidence: 99%

Low cost and compact directional coupler for ultrawideband applications

Zaidel

Rahim

Seman

et al. 2012

Micro & Optical Tech Letters

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A design of a compact size (35 × 15 mm2) 3‐dB coupler with ultrawideband (UWB) characteristic is demonstrated in this article. The proposed design is accomplished by forming two diamond‐shaped microstrip lines that are broadside coupled by a slot at the middle ground plane. The dimension of the design was initialized using a simple mathematical formula and optimized using the CST microwave studio simulator. The design coupler is fabricated and measured. It shows comparable results of the simulation and measurement for the phase difference between two output ports, return loss, isolation, and 3‐dB coupling over an UWB frequency range between 4 and 8.34 GHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:670–674, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26616

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Microstrip-Slot Coupler Design-Part II: Practical Design Aspects

Cited by 12 publications

References 6 publications

Miniaturized Broadband Quadrature Hybrid Coupler With Phase Shifter

Miniaturized Broadband Quadrature Hybrid Coupler With Phase Shifter

Terahertz Band Propagation Characteristics of Coupling Multiconductor Transmission Lines in Multilayer Media

Low cost and compact directional coupler for ultrawideband applications

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