High/low-impedance transmission-line and coupled-line filter networks for differential phase shifters

Sobis, Peter; Stake, Jan; Emrich, Anders

doi:10.1049/iet-map.2010.0245

Cited by 14 publications

(16 citation statements)

References 20 publications

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“…Fig. 5 shows the theoretic variation rules of the calculated bandwidth for DM phase shift based on equations (1)- (12) withZ 0e , Z 0o , Z 1 , and Z 2 , where the bandwidth for DM phase shift should satisfy the maximum phase deviation doesn't exceed 5%.…”

Section: Theoretical Analysis On CM Suppression Bandwidthmentioning

confidence: 99%

“…3 (a), where the differences are Steps 3 and 4. In Step 3, plot a curve of theoretic DM phase shift according to equation (12) under the constraint condition of the selected arbitrary values of Z 0e /Z 0o , Z 0e * Z 0o and Z 1 (e.g. Z 0e /Z 0o = 2.5, Z 0e * Z 0o = 2177.1 2 and Z 1 = 22.45 ).…”

Section: Theoretical Analysis On Dm Phase Shift Bandwidthmentioning

confidence: 99%

“…because of the extra stubs or large size of the resonators. Some designs can reduce the circuit size to a certain degree such as the phase shifters using Schiffman structure [9]- [11], high/low impedances technique [12], [13], coupled U-shaped resonators [14], or self-coupled and broadside-coupled lines [15]. Some designs can greatly reduce the size of the phase shifters by using all lumped-elements structure [16], coupled lines with lumped-elements [17], [18], or multisection coupled lines [19].…”

Section: Introductionmentioning

confidence: 99%

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A Compact Balanced Phase Shifter With Wideband Common-Mode Suppression

2019

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In this paper, a balanced phase shifter using cascaded three microstirp lines and two coupled lines is proposed. The reference line is fixed without center delay line. With such configuration, wideband differential-mode (DM) phase shift can be achieved. The coupled line and half-wavelength microstrip line provide the out-of-band and in-band common-mode (CM) suppression, respectively. Compared with the state-of-the-art balanced phase shifters, the proposed balanced phase shifter has the advantages of wideband CM suppression and compact size with simple structure and fixed reference line. Theoretic analysis, parametric study and design procedure are carried out completely. To verify the theoretic prediction, two prototypes covering the frequency of 1.8 GHz are designed with the relative operating bandwidth for 45 • ± 2.1 • (90 • ± 3.7 •) phase shifter of 50% (53%), with the minimum return loss better than 14.7 dB, and the relative CM suppression bandwidth better than 150%.

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Section: Theoretical Analysis On CM Suppression Bandwidthmentioning

confidence: 99%

Section: Theoretical Analysis On Dm Phase Shift Bandwidthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Compact Balanced Phase Shifter With Wideband Common-Mode Suppression

2019

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“…Differential phase shifters are frequently exploited in communication systems such as phased array antennas and microwave control devices. This appliance is made of main and reference lines which produce a constant differential phase shift between them [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Electronically Reconfigurable Two-Stage Schiffman Phase Shifter for Ku Band Beam Steering Applications

Wali¹,

Osman²,

Razban³

et al. 2018

ijacsa

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An electronically reconfigurable phase shifter using two Schiffman sections is performed for beam steering applications in Ku band. The proposed phase shifter consists of only two cascaded coupled-line sections with the reference line removed. This circuit is loaded by varactor diodes that ensure its tunability over a wide bandwidth. By supplying these varactor diodes with suitable bias voltages, a phase shift is continuously adjusted and reached up to 168° at 12.7 GHz with low insertion losses according to the simulations. Thus, the proposed two-stage phase shifter is able to reach a beam steering angle of 28.6° at 12.7 GHz with only one control voltage. The proposed structure exhibits that our phase shifter has a compact size and a large phase shifting range throughout the Ku band. The tunable phase shifter is prototyped and the measurement results are presented.

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“…It was later implemented in [19,20], as a modular receiver and in [21], demonstrating a waveguide integrated 2SB receiver for the first time. A planar version of the 45 degree hybrid, suitable for submillimeter wave applications has also been proposed [22], using simple stepped impedance filters or coupled line filters.…”

Section: Introductionmentioning

confidence: 99%

A Low VSWR 2SB Schottky Receiver

Sobis

Emrich

Stake

2011

IEEE Trans. THz Sci. Technol.

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A novel high performance waveguide integrated sideband separating (2SB) Schottky receiver operating in the 320-360 GHz band is presented. The unique receiver design is based on a core of two subharmonic Schottky diode mixers with embedded LNA's with a minimum noise figure of 1.8 dB, fed by LO and RF quadrature hybrids. At room temperature, a typical receiver SSB noise temperature of 3000 K is measured over most of the band reaching a minimum of 2700 K, with only 4 mW of LO power. The sideband ratio SBR is typically below 15 dB over the whole band and the measured LO input return loss is typically below 15 dB broadband. High performance sideband separating Schottky receivers can now for the first time be considered for submillimeter wave systems enabling new types of instrument concepts.

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High/low-impedance transmission-line and coupled-line filter networks for differential phase shifters

Cited by 14 publications

References 20 publications

A Compact Balanced Phase Shifter With Wideband Common-Mode Suppression

A Compact Balanced Phase Shifter With Wideband Common-Mode Suppression

Electronically Reconfigurable Two-Stage Schiffman Phase Shifter for Ku Band Beam Steering Applications

A Low VSWR 2SB Schottky Receiver

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