Lumped-distributed hybrids in 3D–MMIC technology

Ng, C.Y.; Chongcheawchamnan, M.; Robertson, I.D.

doi:10.1049/ip-map:20040656

Cited by 14 publications

(6 citation statements)

References 5 publications

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“…Table 2 compares the proposed rat-race coupler with the state-of-the-art on-chip designs in the literature, which includes those on the GaAs substrate [11,12], multilayer BCB process [13], CMOS technology [14] and IPD technology [18]. The proposed IPD coupler, when compared with those using the lossy GaAs/CMOS technologies [13,14], alleviates the parasitic power dissipation whereas still keeping a very compact size. It makes the coupler more attractive in practical applications.…”

Section: Resultsmentioning

confidence: 99%

“…On-chip rat-race couplers have also drawn considerable attention because of their capability to integrate with other circuit components monolithically. Based on the popular lumped-distributed approach, on-chip 180°hybrids were reported in [11][12][13] using multilayer benzocyclobuten polymer (BCB)s or Si 3 N 4 on a GaAs substrate. In general, the operating bandwidths of these on-chip couplers are limited to 20-30%.…”

Section: Introductionmentioning

confidence: 99%

“…In general, the operating bandwidths of these on-chip couplers are limited to 20-30%. The coupler in [13] shows an extraordinarily compact size with a relative area of 2.2%; however, its power dissipation, 2.2 dB, is unacceptable. By combining a phase inverter with 90°lines, a very wideband rat-race coupler using 0.18 μm CMOS technology has been reported in [14].…”

Section: Introductionmentioning

confidence: 99%

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On‐chip miniaturised wideband rat‐race coupler using integrated passive device technology

Tseng

2014

IET Microwaves, Antennas & Propagation

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In this study, a miniaturised wideband rat‐race coupler using glass integrated passive device (GIPD) technology is studied. The circuit miniaturisation is achieved using slow‐wave synthesised coplanar waveguides (CPWs). For wideband operation, a compact CPW phase inverter is developed and integrated. At the centre frequency, 12 GHz, the proposed rat‐race coupler is only 6.5% the size of a conventional 1.5‐λg ring coupler with the same GIPD technology; the fractional bandwidths, on the other hand, reach 65 and 32%, respectively, at the sum and difference ports. The coupler shows good amplitude and phase balances, with the transmission loss around 0.7–1.1 dB at the centre frequency.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On‐chip miniaturised wideband rat‐race coupler using integrated passive device technology

Tseng

2014

IET Microwaves, Antennas & Propagation

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“…In order to reduce the chip area, techniques have been proposed for the quadrature hybrids by using multilayer configurations [1], [2], 3-D technologies [3], and lumped [4]- [7] or lumped-distributed equivalence [8]. However, due to the lack of high-on-chip passive components, most of the miniaturized circuits suffer from high insertion losses, large phase error, and unequal coupling at the thru and coupled port.…”

Section: Introductionmentioning

confidence: 99%

A Compact Quadrature Hybrid MMIC Using CMOS Active Inductors

Hsieh

Liao²,

2007

IEEE Trans. Microwave Theory Techn.

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A miniaturization technique for the quadrature hybrid is proposed for monolithic-microwave integrated-circuit applications. By using active inductors for the circuit implementation, a significant area reduction can be achieved due to the absence of distributed components and spiral inductors. Using a 0.18-m bulk CMOS process, a 4.2-GHz quadrature hybrid is implemented for demonstration. The chip size measures 0.72 0.64 mm 2 where the hybrid circuit only occupies active area of 0.4 0.2 mm 2 . With the enhanced factor provided by the active inductors, the fabricated circuit has an insertion loss less than 0.4 dB for 3-dB coupling while maintaining excellent return losses and port isolation in the vicinity of the center frequency. Owing to the reconfigurable capability provided by the CMOS active inductors, the center frequency of the quadrature hybrid can be varied from 3.6 to 4.7 GHz by adjusting the bias currents, exhibiting a tuning range of 26% at -band.

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“…One approach used phase inverters to shorten the 3..1/4 section to a length of A./ 4 [186][187][188][189][190]. Another popular approach added lump components to the distributed components to reduce or e liminate certain distributed portions [191][192][193].…”

Section: Introduction Of Rat-race Hybridmentioning

confidence: 99%

Air-gapped microaxial transmission line technology for Si-based microwave integrated circuits

Tian¹

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Lumped-distributed hybrids in 3D–MMIC technology

Cited by 14 publications

References 5 publications

On‐chip miniaturised wideband rat‐race coupler using integrated passive device technology

On‐chip miniaturised wideband rat‐race coupler using integrated passive device technology

A Compact Quadrature Hybrid MMIC Using CMOS Active Inductors

Air-gapped microaxial transmission line technology for Si-based microwave integrated circuits

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