A 1–21 GHz, 3-bit CMOS true time delay chain with 274 ps delay for ultra-broadband phased array antennas

Hu, Feng; Mouthaan, Koen

doi:10.1109/eurad.2015.7346303

Cited by 11 publications

(6 citation statements)

References 9 publications

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“…Its advantages are the signal dynamic range expansion, receiving multiple beams, etc. [1][2] Figure 1 is a local schematic of the sub-array distribution of the array. Schematic diagram is given in figure 2.…”

Section: System Scheme Of the Digital Array Channelmentioning

confidence: 99%

“…The downlink signal is amplified, filtered, sampled and orthogonally processed, and is transmitted to DBF using optical fiber. [1][2]…”

Section: System Scheme Of the Digital Array Channelmentioning

confidence: 99%

“…When the broadband digital array radar carries out wide angle scanning, it is necessary to accurately compensate the delay of the complex envelope signal of each array signal.And it need to conduct the phase shift processing so that the digital signal of each array can be aligned in time, so as to realize the addition of each array signal, then the array can achieve the optimal energy gain in the desired direction. [2] To realize the formation of arbitrary bandwidth radar signal beam, TTD devices are used to compensate the complex envelope of individual array signals. This delay is especially required for large scanning angles of large aperture arrays.…”

Section: Delaymentioning

confidence: 99%

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Study on a digital array system of airborne fire control radar

Liu

Zhong²,

Chen³

et al. 2023

Third International Conference on Digital Signal and Computer Communications (DSCC 2023)

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Digital array radar has many advantages, such as large gain, high reliability, extended dynamic range and airspace anti-interference. However, due to the limited development of digital array transceiver components, there are still some difficulties to realize the full digital array radar. This paper proposes a digital array radar applied to the fighter, which realizes the frequency transformation, filtering and sampling at the sub-array level. The signal is transmitted to the beam synthesis module through optical fiber, and separately generate the dots and navigation tracks. The key points of delay, transmission and dynamic range in digital array system design are presented. Finally, the test and calibration methods of digital array channels and the opportunities and challenges of digital array system design are discussed. The radar system scheme of sub-array-level digitization takes into account many factors, such as applicability, anti-interference and cost.It meets the tactical requirements of the current stage.

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Section: System Scheme Of the Digital Array Channelmentioning

confidence: 99%

“…The downlink signal is amplified, filtered, sampled and orthogonally processed, and is transmitted to DBF using optical fiber. [1][2]…”

Section: System Scheme Of the Digital Array Channelmentioning

confidence: 99%

Section: Delaymentioning

confidence: 99%

See 1 more Smart Citation

Study on a digital array system of airborne fire control radar

Liu

Zhong²,

Chen³

et al. 2023

Third International Conference on Digital Signal and Computer Communications (DSCC 2023)

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show abstract

“…where c is the speed of light and θ is the scanning angle. A recently published TTD circuit, a trombone-like structures [6], combining gm-RC and LC delay network, achieves flat delay [7], [8]. However, compared with passive TTD circuits, these active solutions consume a certain power meanwhile exhibiting a limited linearity performance.…”

Section: Design Considerationsmentioning

confidence: 99%

7-Bit Multilayer True-Time Delay up to 1016ps for Wideband Phased Array Antenna

Yoon

Nam

2019

IEICE Trans. Electron.

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We present a seven-bit multilayer true-time delay (TTD) circuit operating from 1 to 7 GHz for wideband phased array antennas. By stacking advanced substrates with low dielectric loss, the TTD with PCB process is miniaturized and has low insertion loss. The signal vias with surrounding ground vias are designed to provide impedance matching throughout the band, allowing the overall group delay to be flat. The standard deviation of the TTD for all states is below 19 ps, which is 1.87% of the maximum group delay. The maximum delay is 1016 ps with resolution of 8 ps. The implemented TTD is 36.6 × 19.4 mm 2 and consumes 0.65 mW at 3.3 V supply for all the delay states. The measured input/output return loss is better than 12.1 dB for the band of 1-7 GHz.

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“…The switches (S 1 -S 8 ) are applied to control the base biasing currents of amplifiers (B 1 -B 8 ). Differing from [8,9], the switching amplifier removes the cascode topology used as on-off switching operation. Alternatively, the proposed active switch places switches to control the bias current and adds the DC-blocking capacitors at the input terminal.…”

Section: Active Switchmentioning

confidence: 99%

Electronic UWB tunable true-time delay line for timed array antennas

Yang

Bao

2018

IEICE Electron. Express

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This study presents a silicon-based ultra-wideband (UWB) truetime delay line for timed array antennas. The proposed circuit uses the novel active switches to mitigate performance deterioration from on-off switching. The proportional-to-absolute-temperature (PTAT) biasing circuit and scaling technique are adopted to improve the gain stability against the PVT variation at the different delay settings. The experimental prototype is fabricated in a 0.13 µm SiGe BiCMOS process, and exhibits a maximal relative delay of 35 ps with an average of 5 ps over a frequency range of 14-34 GHz. The chip occupies an area of 0.62 mm 2 , and the measured average input 1-dB compression point is 13 dBm.

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A 1–21 GHz, 3-bit CMOS true time delay chain with 274 ps delay for ultra-broadband phased array antennas

Cited by 11 publications

References 9 publications

Study on a digital array system of airborne fire control radar

Study on a digital array system of airborne fire control radar

7-Bit Multilayer True-Time Delay up to 1016ps for Wideband Phased Array Antenna

Electronic UWB tunable true-time delay line for timed array antennas

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