Design of novel wideband reflective phase shifters with wide range of phase applications

Khajepour, Somayeh; Asadi, Sareh; Ghaffarian, Mohammad Saeid; Moradi, Gholamreza

doi:10.1016/j.aeue.2016.11.006

Cited by 13 publications

(9 citation statements)

References 16 publications

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“…It can be seen The performance of the proposed design and the state-ofart balanced phase shifters are listed in Table 3. Compared with the single-ended designs [5], [9], [11], [17] and [18], the proposed balanced design has narrower BW, but it has common-mode suppression and higher impedance matching level. Compared with the reported balanced designs, the proposed design exhibits the widest operating BW.…”

Section: Prototypes and Resultsmentioning

confidence: 99%

“…Compared with the single-ended phase shifter, balanced phase shifter has the advantages of high immunity for electromagnetic interference and convenient connection with other balanced circuits or antennas. For the single-ended wideband phase shifters, the wide bandwidth is usually achieved by using Schiffman structure [1], [2], stub-loaded transmission line [3]- [6], microstrip-slot transitions [7], multimode resonator structures [8], [9], coupled structures [10]- [17], loaded lumped element [18], and so on. However, these designs needn't consider CM suppression when comparing with the balanced counterparts.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Compact Single-Layer Balanced Phase Shifter With Wide Bandwidth and Uniform Reference Line

Zhang

Shi

et al. 2020

IEEE Access

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A single-layer balanced phase shifter with uniform reference line is proposed to achieve the advantages of compact size and wide bandwidth compared with state-of-art single-layer balanced phase shifters. The odd-mode equivalent circuit with one quarter-wavelength coupled line and two quarterwavelength short-ended stubs makes wideband differential-mode (DM) impedance matching and phase shift. The even-mode equivalent circuit with two transmission paths provides wideband common-mode (CM) suppression without affecting the DM responses. The prototype of 45 • (90 •) phase shifter is designed with the operating bandwidth of 81% (82%), with the phase deviation of ±2.3 • (±4.7 •), with the minimum insertion loss of 0.29 dB (0.31 dB), and with the size of 0.27 λ 2 g (0.35 λ 2 g , λ g is the guided wavelength at the center frequency f 0).

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Section: Prototypes and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Compact Single-Layer Balanced Phase Shifter With Wide Bandwidth and Uniform Reference Line

Zhang

Shi

et al. 2020

IEEE Access

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“…Furthermore, Z e and Z o are calculated in order to have a special bandwidth or phase deviation, and input impedance of coupled transmission line [19]. Several references reported improvement in Schiffman phase shifter [20][21][22][23][24]. For the coupled line, a phase shift of 90° over a bandwidth is provided between ports 2 and 4 when ports 1 and 3 are excited.…”

Section: Broadband 90° Phase Shifter Designmentioning

confidence: 99%

Wideband low cost planar mono‐pulse comparator circuit

Ghaffarian¹,

Honari

Khajepour³

et al. 2017

IET Microwaves, Antennas & Propagation

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A novel wideband planar single layer mono‐pulse comparator for the application of mono‐pulse angle of arrival and target detecting is presented. This low cost comparator consists of three new broadband differential phase shifters and four 3 dB hybrid commercial couplers to generate sum and delta (difference) output channel frequency response. The operating frequency ranges in S band over one octave from 2 to 4 GHz. The comparator circuit is designed and fabricated on single layer RO4003C microstrip board with the simple and low cost PCB process. The amplitude imbalance and phase shift ripple between the four input channels and two sum and delta output channels are <1 dB and 2.5°, respectively. By integrating a four‐arm spiral antenna and the proposed comparator, a mono‐pulse antenna is designed and fabricated. In the frequency range from 2 to 4 GHz, the sidelobe level is ≤17 dB, the sum gain is measured as >3 dBic, and the null depth is better than 25 dB. The obtained sum and difference radiation characteristics make the proposed mono‐pulse antenna promising for target detecting and tracking in the two dimension applications.

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“…Caillet et al in [9] employ dual-layer aperture coupled transition to provide 180 • power divider with 29% bandwidth. Also we could accomplish feeding network with the combination of broadband 180 • phase shifter [16] and wideband coupler structure proposed in [15]. Geometry of the proposed novel compact feeding structure is shown in Fig.…”

Section: Antenna and Feeding Circuit Configuration And Designmentioning

confidence: 99%

Quadrifilar Helix Antenna Using Compact Low-Cost Planar Feeding Circuit in Array Configuration

Ghaffarian¹,

Khajepour²,

Moradi³

2016

PIER C

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A wideband printed quadrifilar helical antenna (PQHA) using a novel single layer compact feeding circuit is proposed in this paper. A low-cost single-layer feeding circuit which consists of a 180 • compact rat race coupler and two 3 dB hybrid commercial couplers is incorporated at the bottom of the quadrifilar antenna. The antenna arms are tapered at the feeding point to improve impedance matching between the antenna and feeding circuit. The operating frequency band ranges from 1.9 to 2.3 GHz which shows that the proposed antenna is a good candidate for various applications such as satellite communication and broadcasting satellite systems. Therefore, the array of the proposed antenna on the simple cube satellite mock-up is investigated. By this antenna array configuration, a fully spherical radiation coverage is obtained around the structure. The bandwidth of the axial ratio (AR) with a wide beamwidth (160 o) is 20% in operating frequency band. The measured peak gain of the proposed antenna varies between 2.6 and 3.2 dBic in the frequency band of interest. The measured 3 dB AR half-power beamwidth is 160 • .

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Design of novel wideband reflective phase shifters with wide range of phase applications

Cited by 13 publications

References 16 publications

A Compact Single-Layer Balanced Phase Shifter With Wide Bandwidth and Uniform Reference Line

A Compact Single-Layer Balanced Phase Shifter With Wide Bandwidth and Uniform Reference Line

Wideband low cost planar mono‐pulse comparator circuit

Quadrifilar Helix Antenna Using Compact Low-Cost Planar Feeding Circuit in Array Configuration

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