Coupled Line 180$^{\circ}$ Hybrids With Lange Couplers

Napijalo, V.

doi:10.1109/tmtt.2012.2217980

Cited by 20 publications

(14 citation statements)

References 40 publications

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“…Compared to the previous hybrids in [27], [29], and [31], the two proposed hybrids have a wider bandwidth in terms of less than 5 in-phase and out-of-phase phase imbalance. While, under the criteria of amplitude imbalance dB, the bandwidth of the two proposed hybrids are much larger than that of the hybrid in [28].…”

Section: Bandwidth Analysismentioning

confidence: 93%

“…Later on, non-TEM couplers [29], [30] and near-TEM Lange couplers [31] are used to construct the non-interspersed input/output ports 180 hybrid on the basis of the microstrip coupled line structure [32]. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Since the even-and odd-mode velocities of the coupled lines for non-TEM couplers are different, equal power division or symmetrical over-coupling for single frequency is impossible if non-TEM directional couplers are used to construct the coupled line 180 hybrid [29], [31]. Though near-TEM Lange couplers tends to compensate for the unequal even-and odd-mode phase velocities [31], the closed narrow lines and the necessary bonding wires across the lines are difficult to fabricate.…”

Section: Introductionmentioning

confidence: 99%

“…Though near-TEM Lange couplers tends to compensate for the unequal even-and odd-mode phase velocities [31], the closed narrow lines and the necessary bonding wires across the lines are difficult to fabricate. Moreover, via-holes not only complicate the printed circuit board (PCB) fabrication process, but also cause an extra inductive effect, which increases phase and amplitude imbalances of the output signals.…”

Section: Introductionmentioning

confidence: 99%

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Novel Coupled Line 180<formula formulatype="inline"> <tex Notation="TeX">$^{\circ}$</tex></formula> Hybrid With Non-Interspersed Input and Output Ports

Wang

2014

IEEE Trans. Microwave Theory Techn.

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This paper presents a novel coupled line 180 hybrid with non-interspersed input/output ports. With the combination of a weak coupling parallel coupled line and strong coupling trans-directional coupler, a non-interspersed input/output ports coupled line 180 hybrid is obtained by using printed circuit board fabrication process, and reduced substrate area is achieved. The proposed hybrid owns the features of reducing the complexity of dc biasing for the next-stage active circuits. Moreover, it requires no bond wires, via-holes, or multilayer structures. The formula of the proposed hybrid is derived, and the characteristics of the hybrid are analyzed. Two prototypes are designed to verify the concept. One is arranged with the two couplers perpendicular to each other, and the other is constructed with the two couplers arranged in a line. The measured results are in good agreement with the simulated ones Index Terms-Coupled line 180 hybrid, dc blocking, non-interspersed input/output ports, reduced substrate area, trans-directional (TRD) coupler.

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Section: Bandwidth Analysismentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Coupled Line 180<formula formulatype="inline"> <tex Notation="TeX">$^{\circ}$</tex></formula> Hybrid With Non-Interspersed Input and Output Ports

Wang

2014

IEEE Trans. Microwave Theory Techn.

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“…Moreover, with the combination of the proposed TRD coupled lines and parallel coupled lines, the rat-race coupler has the feature of uncrossed input/output ports [16][17][18], which is a new direction of improvements focusing on the rat-race coupler. Such a property can be beneficial when laying out complex microwave circuit.…”

Section: Introductionmentioning

confidence: 99%

Coupled Line Rat-Race Coupler With Wide Adjustable Power Dividing Ratio and Uncrossed Input/Output Ports

Li¹,

Fang²,

Wang³

2017

PIER C

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Abstract-A novel rat-race coupler with wide adjustable range of power-dividing ratio and uncrossed input/output ports is presented by using coupling adjustable trans-directional (TRD) coupled lines, parallel coupled lines and a 180 • phase shifting line. Wide adjustable range of power-dividing ratios is accomplished by varying the coupling of the TRD coupled lines. Moreover, with the combination of the TRD coupled lines and parallel coupled lines, the input and output ports of the rat-race coupler are uncrossed. The structure of the proposed rat-race coupler is analyzed, and the design equations are derived. As an example to validate the feature of the proposed rat-race coupler, a prototype operating at 1.6 GHz is devised, fabricated and measured. The measured results show that the designed coupler has a wide adjustable range (−7 ∼ 15 dB) of power dividing ratio with a controlled voltage range of 3.3 to 13.5 V.

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High-performance cryogenic fractal 180° hybrid power divider with integrated directional coupler

et al. 2017

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A 180° hybrid and a directional coupler to be employed in the P‐band cryogenic receiver of the Sardinia Radio Telescope are proposed in this work. An in‐depth study of the issues related to the use of microwave components for cryogenic radio astronomy receivers is carried out to select the best suited technology and configuration. As a result, a planar fractal 180° hybrid configuration available in the literature has been optimized aiming to increase the operating bandwidth in order to comply with the design specifications of the application at hand. A coupled line directional coupler with weak coupling and high isolation, used to calibrate the receiver chain, is cascaded to the 180° hybrid and realized in the same layout. The final device, consisting of the 180° hybrid and the directional coupler, has been manufactured and tested at the cryogenic temperature of 20 K, showing a good agreement between experimental results and predicted performance.

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Coupled Line 180$^{\circ}$ Hybrids With Lange Couplers

Cited by 20 publications

References 40 publications

Novel Coupled Line 180<formula formulatype="inline"> <tex Notation="TeX">$^{\circ}$</tex></formula> Hybrid With Non-Interspersed Input and Output Ports

Novel Coupled Line 180<formula formulatype="inline"> <tex Notation="TeX">$^{\circ}$</tex></formula> Hybrid With Non-Interspersed Input and Output Ports

Coupled Line Rat-Race Coupler With Wide Adjustable Power Dividing Ratio and Uncrossed Input/Output Ports

High-performance cryogenic fractal 180° hybrid power divider with integrated directional coupler

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