A Semi-Lumped Miniaturized Spurious Less Frequency Tunable Three-port Divider\Combiner with 20 dB Isolation Between Output Ports

Perrier, Anne-Laure; Exshaw, Olivier; Duchamp, Jean‐Marc; Ferrari, Philippe

doi:10.1109/mwsym.2006.249710

Cited by 10 publications

(7 citation statements)

References 9 publications

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“…Figure 2 shows the topology of the power divider proposed in this article. As shown in [9], this topology can be divided in two blocs: an "input transformer" and an "output loop." This loop is necessary to achieve isolation between the two output ports (ports 2 and 3).…”

Section: Principlementioning

confidence: 99%

“…The input impedance at the junction point (J), seen from ports 2 and 3, is not necessarily equal to the matching input impedance (usually 50 ⍀). The input transformer differs from [9], it is just composed by one capacitor and one transmission line.…”

Section: Principlementioning

confidence: 99%

“…From the output to the input: the output branches transform a resistive load into a complex load using a small-length transmission line; this complex load is then transformed to a resistive load thanks to a small-length complex impedance transformer. This topology, proposed for a tunable power divider in 2006, leads to miniaturized and fixed power dividers with a harmonic rejection [9]. The complex impedance transformer is realized by a transmission line loaded by a capacitor, leading to a slow-wave and low-pass behavior.…”

Section: Introductionmentioning

confidence: 99%

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A miniaturized three‐port divider/combiner

Perrier

Duchamp

Ferrari

2007

Micro & Optical Tech Letters

Self Cite

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Section: Principlementioning

confidence: 99%

Section: Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A miniaturized three‐port divider/combiner

Perrier

Duchamp

Ferrari

2007

Micro & Optical Tech Letters

Self Cite

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“…To that end, many researchers have managed to realise tunability of centre frequency [57]- [58] or operating band range [59]- [60]. However, these designs still can"t change the amplitude of power at output terminations.…”

Section:  Other Techniquesmentioning

confidence: 99%

“…In [61], though a planar structure with variable amplitude ratio was presented, it suffered from the obvious drawback of uncontrolled phase performance at three output ports. Fig 2.3(a) shows a design of a tunable power divider with 2:1 power division based on a ring structure [57]. Fig 2.4(b) shows another frequency agile power divider which covers frequency range of 1.7 GHz to 2.4 GHz [62].…”

Section:  Other Techniquesmentioning

confidence: 99%

Multi-functional and Tunable Microwave Devices and Sub-systems for Wideband Applications

Zhu¹

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Microwave components and sub-systems have been widely investigated in recent years since they play essential roles in microwave systems. With the rapid development and explosive extension of microwave techniques, high speed, large data volume, and electromagnetic compatibility are not the only issues that concern designers, practitioners, and researchers. Features like multi-functionality, reconfigurability, portability, low energy consumption, miniaturization of circuit size and simple construction have come into focus more and more in recent years. Currently, microwave devices are suffering from several drawbacks: huge losses from a lack of integration of individual components, lack of new functionality, poor adaptability to different environments, low efficiency, flexibility and controllability, high cost and energy consumption, and insufficient miniaturization of circuit size.With these existing challenges and the huge call for innovation in microwave components and subsystems, new design approaches and structures are extremely in demand and a high point of focus.This thesis aims to solve some of the current challenges mentioned above by making four main contributions.The first contribution is the development of new design approaches to design microwave devices with multiple functions to replace cascaded devices with a single function. The main target is to reduce the overall number of components used in constructing microwave systems. With a large number of cascaded devices, huge losses will be produced which decrease systems" reliability and overall performance, not to mention the current large circuit volumes, high cost, and energy consumption. Multi-functional componentry is a suitable and proper solution to solve these problems. In wireless microwave systems, power dividers are usually cascaded with bandpass filters, to get rid of unwanted signals and transmit the desired ones. When the number of output terminations is raised, more filters are required, which makes it more difficult for design and implementation. A four-way power divider integrated with filtering characteristics is proposed to replace the cascaded structures. The proposed design shows equal power division, great selection of filtering signals and reduction in device numbers and overall cost.The second contribution is the development of multiple tunable microwave devices which can be controlled and adapted to different environments. An electrical tuning method is used by loading varactors on microstrip lines. To begin with, tunable bandpass filters were investigated to achieve high tunability of both centre frequency and bandwidth. To that end, several new designs with varactor-loaded coupled-line sections were proposed and verified. Relocatable transmission zero was realised to control the cut-off of the passband at two edges. The concept was applied in the II design of a tunable balanced bandpass filter with a wide tuning range and high common-mode suppression. Wideband power dividers with tunable power division at output termi...

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Metamaterial transmission lines with tunable phase and characteristic impedance based on complementary split ring resonators

Vélez

Bonache

Martín

2009

Micro & Optical Tech Letters

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In this article, resonant-type tunable metamaterial transmission lines with independent control over the electrical parameters of the line, that is, the electrical length and characteristic impedance, are presented for the first time. Tuning is achieved by loading a host microstrip line with varactor-loaded complementary split ring resonators (VLCSRRs) and varactor diodes. By locating the varactor diodes in series configuration with the line, outside the region occupied by the VLCSRRs, it is possible to control the characteristic impedance and the electrical length (phase shift), over a wide band. As an illustrative example, a tunable 35 ⍀/90°line functional between 0.4 and 0.8 GHz (which represents more than 65% tuning range), is presented and applied to the design of a transmission line power divider. The device is small and it exhibits reasonable performance. ABSTRACT: An LC-tank injection locked frequency divider (ILFD) is proposed, and the ILFDs with a direct-injection MOSFET and a tail-injection HBT were implemented in the 0.35 m SiGe 3P3M BiC-MOS technology. Measurement results show that when the tuning voltage is tuned from 0 V to 1.8 V, the free-running oscillation frequency of ILFD is tunable from 2.29 GHz to 2.94 GHz, and at the incident power of 0 dBm the divide-by-2/(-4) operation range is from the incident frequency 4.2 to 6.7/(9.06 to 11.96) GHz. The core power consumption is 2.6 mW at V dd ϭ 1.1 V.

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A Semi-Lumped Miniaturized Spurious Less Frequency Tunable Three-port Divider\Combiner with 20 dB Isolation Between Output Ports

Cited by 10 publications

References 9 publications

A miniaturized three‐port divider/combiner

A miniaturized three‐port divider/combiner

Multi-functional and Tunable Microwave Devices and Sub-systems for Wideband Applications

Metamaterial transmission lines with tunable phase and characteristic impedance based on complementary split ring resonators

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