A Schematic for Broadband Beam Formation Using Time-Delay Technique

Alfred, Quazi Mohmmad; Bishayee, Kousik; Chakravarty, Tapas; Sanyal, Sugata

doi:10.2528/pierm08042802

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2012

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“…The shape of the beam and the direction of the main lobe depend on amplitude and phase settings, and both are electronically controlled. Beam-formers are used to create a line-of-sight connection between a transmitter and a receiver [11,12].…”

Section: Introductionmentioning

confidence: 99%

A Distributed Variable Delay Line for Wideband Beam-Formers

Dabbagh¹,

Khalaf²,

Hawa³

2012

PIER Letters

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Abstract-A fully integrated CMOS wideband distributed variable delay line for time array beam-formers is presented. The delay line works over a full differential mode, and the delay cell function is based on differential amplifiers with active inductive peaking loads. A delay resolution of 15 ps is obtained with a maximum delay capability of 150 ps. The designed active delay line provides 3 scanning angles with 8.6 • of spatial resolution. This delay line is applicable for a 4 channel beam-former with an operational bandwidth of 500 MHz centered at 5 GHz. Our active delay line consumes up to 352 mW of power from a 2.5 V supply. The circuit is simulated in standard 0.25 µm BiCMOS process and occupies 252 µm × 123 µm of silicon area.

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Section: Introductionmentioning

confidence: 99%