On the Design of Stepped Transmission-Line Transformers (Correspondence)

Hamid, M.; Yunik, M.

doi:10.1109/tmtt.1967.1126525

Cited by 12 publications

(9 citation statements)

References 1 publication

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“…(13), a solution exists for Eq. (14) only if the absolute value of right hand side is no larger than unity. It is also clear from inspection that the smallest solution for h À 2l 1 b will be between p/2 and p.…”

Section: Design Principlementioning

confidence: 99%

“…Tuners based on this principle are used commercially for automatic testing of power amplifiers, where they are known as ''double slug" or ''interferometric" load-pull tuners, and the slugs are typically driven by computer-controlled motors [13]. The basic structure is derived from the stepped transformer [14] which has long been used in wireless communication. There are obvious attractive features of the adjustable segmented line-it requires no adjustable capacitors, and it has no sliding contacts that might wear.…”

Section: Introductionmentioning

confidence: 99%

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Impedance matching with an adjustable segmented transmission line

Cui¹,

Brey²

2009

Journal of Magnetic Resonance

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Section: Design Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impedance matching with an adjustable segmented transmission line

Cui¹,

Brey²

2009

Journal of Magnetic Resonance

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“…In parallel, researches were performed on complex impedance transformers, not based on quarter-wave transmission lines. A principle was shown in 1967 [8].…”

Section: Introductionmentioning

confidence: 99%

A miniaturized three‐port divider/combiner

Perrier

Duchamp

Ferrari

2007

Micro & Optical Tech Letters

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“…In parallel, researches were carried out on complex impedance transformers, not based on quarterwave transmission lines. One principle was shown in 1967 [8].…”

Section: Introductionmentioning

confidence: 99%

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

Perrier

Exshaw

Duchamp

et al. 2006

2006 IEEE MTT-S International Microwave Symposium Digest

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Abstract-We propose a new topology based on a semilumped complex impedance transformer for the design of a frequency tunable three-port power divider. A prototype has been realized in a hybrid technology with commercially available varactor diodes. Our design is based on an impedance transformer in the input branch (with electrical length of 20.4°), and a loop in the output branches (with electrical length of 2x24°). This leads to a miniaturized device, more than two times shorter than a classical Wilkinson power divider. This divider can be tuned over ±30% around 1.35 GHz (from 0.95 GHz to 1.75 GHz) with insertion loss lower than 0.3 dB, return loss better than 20 dB and isolation between the two output ports better than 20 dB. Moreover, the low-pass behavior of the input impedance transformer leads to a good rejection of the second harmonic.

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On the Design of Stepped Transmission-Line Transformers (Correspondence)

Cited by 12 publications

References 1 publication

Impedance matching with an adjustable segmented transmission line

Impedance matching with an adjustable segmented transmission line

A miniaturized three‐port divider/combiner

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

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