Distributed analog phase shifters with low insertion loss

Nagra, A.S.; York, R.A.

doi:10.1109/22.788612

Cited by 199 publications

(70 citation statements)

References 8 publications

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“…The surface roughness of the BZN films was about ~ 6 nm RMS (root mean square). A distributed phase shifter was designed using principles described in [6], [15]. The structure is a periodically-loaded transmission-line that can be treated as a synthetic transmission line with a voltage-variable phase-velocity.…”

Section: Introductionmentioning

confidence: 99%

Distributed phase shifter with pyrochlore bismuth zinc niobate thin films

Park

Boesch

et al. 2006

IEEE Microw. Wireless Compon. Lett.

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Abstract-A monolithic Ku-band phase shifter employing voltage tunable Bi1.5Zn1.0Nb1.5O7 (BZN) thin film parallel plate capacitors is reported. BZN films were deposited by RF magnetron sputtering on single-crystal sapphire substrates. A nine-section distributed CPW loaded-line phase-shifter structure was designed. A differential phase shift of 175° was achieved with a maximum insertion loss of 3.5 dB at 15 GHz, giving a figure of merit ~ 50°/dB. To the best of our knowledge, this is the first demonstration of a monolithic tunable microwave circuit using BZN thin films.

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Section: Introductionmentioning

confidence: 99%

Distributed phase shifter with pyrochlore bismuth zinc niobate thin films

Park

Boesch

et al. 2006

IEEE Microw. Wireless Compon. Lett.

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“…A detailed extraction method can w x be found in Ref. 8 and similar techniques have already been used to design analog and digital w x MEMS based phase shifters 7, 10 . With 60 V bias voltages, tuning factor of 1.27 : 1 is extracted from measured data, which is lower than what we expected in simulation.…”

Section: Measurements and Discussionmentioning

confidence: 99%

Distributed MEMS transmission lines for tunable filter applications

Liu

Borgioli

Nagra

et al. 2001

Int J RF and Microwave Comp Aid Eng

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This paper describes the design and fabrication of a distributed MEMS ( ) transmission line DMTL , used to realize a transmission-line with a voltage-variable electrical length for microwave circuits. The DMTL is a coplanar waveguide periodically loaded with continuously-variable MEMS capacitors. A tunable bandpass filter was designed and fabricated on 700 m thick glass substrates using three capacitively coupled DMTL sections as variable shunt resonators. The measured results demonstrate a 3.8% tuning range at 20 GHz with 3.6 dB minimum insertion loss. Issues for future improvement are discussed. ᮊ

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“…Also, high impedance transmission lines generally have more ohmic loss than lower impedance ones. These conflicting requirements lead to an optimized design that balances the losses, resulting in the lowest loss design [1]. As a result, the best design from a loss perspective doesn't necessary have the shortest length or fewest sections.…”

Section: Distributed Phase Shifter Theory and Designmentioning

confidence: 99%

“…When the signal cannot propagate the transmission loss increases, and the signal is reflected back towards the source. This frequency is called the Bragg frequency [1], and is defined in Eq. (3).…”

Section: Distributed Phase Shifter Theory and Designmentioning

confidence: 99%

Compact Distributed Phase Shifters at X-Band Using BST

Serraiocco

Hansen

Taylor

et al. 2003

Integrated Ferroelectrics

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A new type of distributed analog phase shifter is presented that utilizes the coplanar strip transmission line topology. This transmission line has several benefits for phase shifter design, resulting in decreased physical dimensions and potentially lower losses. A prototype was constructed using thin-film barium strontium titante (BST) varactor technology. The design achieved a 49• /dB figure of merit at 10 GHz. The performance and chip area of the coplanar strip circuit are compared with designs using coplanar waveguide and synthetic lumped element transmission lines.

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Distributed analog phase shifters with low insertion loss

Cited by 199 publications

References 8 publications

Distributed phase shifter with pyrochlore bismuth zinc niobate thin films

Distributed phase shifter with pyrochlore bismuth zinc niobate thin films

Distributed MEMS transmission lines for tunable filter applications

Compact Distributed Phase Shifters at X-Band Using BST

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