A novel compact tunable coupled-line power divider using varactors

Shen, Xiaochuan; Liu, Yuanan; Zhou, Siyue; Wu, Yongle

doi:10.1109/apmc.2015.7411653

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…Nevertheless, the design is complex and not reconfigurable. Varactors are mostly used by the researchers in their power divider designs to achieve reconfigurable pro perties for power divider [11][12][13][14][15][16][17]. However, this led to increase in complexity of the design.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable modified wilkinson power divider using PIN diode switch

Edward¹,

Shairi²,

Othman³

et al. 2020

Bulletin EEI

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In this paper, a reconfigurable modified Wilkinson Power Divider (WPD) was proposed. The operating frequencies of the proposed design were either at 2.5 GHz or 3.5 GHz for Worldwide Interoperability for Microwave Access (WiMAX) applications. This proposed design is reconfigurable in terms of its operating frequency by using PIN diode switches. PIN diode switch was used in this design to reconfigure the microstrip line length. By varying the bias voltage of the PIN diode to +5 V or -5 V, the proposed modified WPD can either operate at 2.5 GHz or 3.5 GHz. Rogers RO4350 (er=3.48, h=0.508 mm) was chosen as the substrate material and copper (thickness=0.035 mm) related to patch of design. Based on simulation results obtained from the Advanced Design System (ADS) software, the modified WPD shows good S-parameter performances at 2.5 GHz and 3.5 GHz. However, the measurement results exhibit frequency shifted. Even though there is a correlation between measurement results and simulation results, the resonant frequency was shifted due to parasitic reactance of the PIN diode.

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Section: Introductionmentioning

confidence: 99%

Reconfigurable modified wilkinson power divider using PIN diode switch

Edward¹,

Shairi²,

Othman³

et al. 2020

Bulletin EEI

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“…With the development of wireless communication technology, the demands for reconfigurable components which could cover multiple bands are increasing. Thus, various frequency tunable front-end circuits have been developed, such as power dividers [17,18], couplers [19,20], and baluns [21][22][23][24]. In Reference [21], a compact frequency tunable microstrip balun with a ring structure is proposed.…”

Section: Introductionmentioning

confidence: 99%

A Tunable Planar Balun with an Isolation Circuit Using Varactors Loaded Coupled Lines

et al. 2020

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In this paper, a frequency tunable planar balun composed of varactors loaded coupled lines (VL-CLs) is presented. By tuning the capacitances of the varactors, a wide frequency tuning range is obtained. Moreover, good impedance match, balanced output ports amplitude, and consistent output ports phase difference (PD) are maintained during the tuning. A detailed theoretical analysis using the signal flow diagram and the even-odd mode method is presented to clarify the characteristics of the proposed balun. To achieve ideal output matching and isolation for the proposed balun, a novel frequency tuned isolation circuit (IsC) is designed and connected to the balun. In theory, a frequency tuning range of 200% can be realized. In practice, due to the limited capacitances of the varactors, a prototype with a tunable frequency of 1.0 GHz~2.0 GHz (66.7%) is designed, fabricated, and measured. The measured results show that more than21 dB of return loss (RL), 180 • ± 1.8 • of phase difference, 0.43 dB of amplitude imbalance (AP), and 22 dB of isolation are obtained at all tuning center frequencies, agreeing well with the simulated results.

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“…There are many techniques can be done to achieve tunable properties of power dividers. Most of the researches focus on tuning the operating frequency in power divider [7]- [13]. Tuning the power division ratio also become a recent trend for research [14]- [18].…”

Section: Introductionmentioning

confidence: 99%

Tunable function of feeding network and SPDT switch for WIMAX application

Edward

Shairi

Zakaria

et al. 2019

IJEECS

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<p>A tunable circuit that functions as a power divider and a single pole double throw (SPDT) switch is proposed in this paper. The power divider design was based on the conventional Wilkinson power divider (WPD). Since WPD design has wideband properties, a modification was made in the design to make it narrowband so that it will only work for WiMAX applications. Two shorted stubs were introduced in the transmission line of the output ports to encounter the mismatch when the function was switched to an SPDT switch. Rogers RO4350 (er = 3.48, h = 0.508mm) was used as a substrate material and copper (thickness = 0.035 mm) related to patch of this proposed design. When the circuit functioned as a power divider, the simulated result showed S11 < -16 dB, S12 > 3.97 dB, and S23 < -14 dB for both operating frequencies of 2.5 GHz and 3.5 GHz. On the other hand, when the circuit functioned as an SPDT switch and port 2 was in the ON state, the simulated result showed S11 < -35 dB, S12 > -1.1, S13 < -16 dB, and S23 < 18 dB for both operating frequencies of 2.5 and 3.5 GHz. The proposed design showed a good performance as a power divider and an SPDT switch, thus, it can be used for multifunctional microwave circuits.</p>

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A novel compact tunable coupled-line power divider using varactors

Cited by 8 publications

References 7 publications

Reconfigurable modified wilkinson power divider using PIN diode switch

Reconfigurable modified wilkinson power divider using PIN diode switch

A Tunable Planar Balun with an Isolation Circuit Using Varactors Loaded Coupled Lines

Tunable function of feeding network and SPDT switch for WIMAX application

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