Microstrip Phase Inverter Using Interdigital Strip Lines and Defected Ground

Zhang, Xuchun; Liang, Chuntao; Xie, Jun

doi:10.2528/pierl11121403

Cited by 11 publications

(14 citation statements)

References 5 publications

(8 reference statements)

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“…The frequencies of the inverted phase are moved to lower frequencies compared to the response of the return loss and insertion loss as shown in Figure B. This is due to the signal delays caused by the via holes and can be compensated …”

Section: Resultsmentioning

confidence: 97%

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Microstrip phase inverters with different harmonic waves

Zhang

Liao

Yang

2017

Int J RF Microw Comput Aided Eng

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The structure of the microstrip phase inverters with different harmonic waves is presented. The orders of the harmonic wave can be easily changed through the displacement of slot line in the ground. Theoretical equations for the relationship among the displacement of slot line and the orders of suppressed harmonic waves are derived. A picture is used to figure out the distribution modes of the electrical field of the slot line. For demonstration, three kinds of phase inverter with different harmonic waves are simulated, fabricated, and measured, respectively. The theoretical results, simulated results, and measured results show good agreement in this design, which proved the correctness of the proposed structure.

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Section: Resultsmentioning

confidence: 97%

“… and . Phase inverters can be realized utilizing parallel‐strip transmission line, coplanar waveguide, coplanar strip, substrate integrated waveguide and microstrip with defected ground structure …”

Section: Introductionmentioning

confidence: 99%

Microstrip phase inverters with different harmonic waves

Zhang

Liao

Yang

2017

Int J RF Microw Comput Aided Eng

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“…The inside small slot annuluses with resistors act as bias circuit for blocking AC. The 180° phase inverter is achieved by means of reversing electric field orientations with reference to the ground plane …”

Section: Frequency‐tunable Branch Line Coupler Designmentioning

confidence: 99%

“…The 1808 phase inverter is achieved by means of reversing electric field orientations with reference to the ground plane. 11 The slot line on the ground is a symmetrical structure and the dimensions of the frequency-tunable phase inverter are shown in Figure 3, the width of the transmission lines is W 1 . The width of the slot-line is W s .…”

Section: Introductionmentioning

confidence: 99%

A novel frequency-tunable branch line coupler

Liao

Zhang

Yang

2017

Int J RF Microw Comput Aided Eng

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This article introduces a novel two-section frequency-tunable branch line coupler, which is realized by inserting a narrow band frequency-tunable phase inverter into a wideband two-section branch line coupler's middle branch line. Such frequencytunable method is different from the conventional one. Furthermore, in this bias feeding design, there are only one control voltage, two varactors, two resistors, and two capacitors are utilized. The measured results show that the operation frequency of the branch line coupler can be tuned from 0.73 to 1.33 GHz, and the return loss is >20 dB, the isolation >20 dB, the amplitude imbalances <1 dB, and the phase imbalances is <28. Through the comparison, the measured results basically conform to the simulated results in this design. K E Y W O R D Sbranch line coupler, frequency-tunable, phase inverter, resonant frequency

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“…It has been applied in many microwave components such as power divider [7], rat-race hybrids and feeding network of antenna arrays. In recent years, efforts have been directed to the development of novel phase inverters such as broad-band uniplanar phase inverter [8], dual-band phase inverter [9] and reconfigurable phase inverter [10]. The phase inverter is crucial components in microwave circuits for size reduction and perfect isolation.…”

Section: Introductionmentioning

confidence: 99%

Design of Miniaturized Rat-Race Couplers With Arbitrary Power Division Ratios

Yang¹,

Liao²,

Zhang³

2018

PIER Letters

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Abstract-A miniaturized rat-race coupler with arbitrary power division ratio is proposed in this paper. The design formulas of the rat-race coupler with arbitrary power division ratio are derived using even-odd decomposition analysis. The proposed structure demonstrates miniaturized size and perfect isolation due to adding phase inverter to the branch. For demonstration, a 20 dB rat-race coupler operating at 1 GHz with 81.34% size reduction is designed and fabricated. There is good agreement between measured and simulated results.

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Microstrip Phase Inverter Using Interdigital Strip Lines and Defected Ground

Cited by 11 publications

References 5 publications

Microstrip phase inverters with different harmonic waves

Microstrip phase inverters with different harmonic waves

A novel frequency-tunable branch line coupler

Design of Miniaturized Rat-Race Couplers With Arbitrary Power Division Ratios

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