A modulator-less beam steering transmitter based on a revised DDS-PLL phase shifter architecture

D'Amato, G.; Avitabile, G.; Coviello, Giuseppe; Talarico, Claudio

doi:10.24138/jcomss.v14i1.439

Cited by 1 publication

(2 citation statements)

References 15 publications

(16 reference statements)

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“…The experimental results illustrate how our revised DDS-PLL architecture can be successfully employed to implement a beam steering transmitter for phased arrays. TABLE 2 [22] compares our solution with other state-of-the-art phase shifting architectures. It is important to note that improving the resolution of the phase shifts is more beneficial when the 3-dB angular width of the main lobe is small, that is when the number of elements in the phased array is large.…”

Section: Resultsmentioning

confidence: 99%

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DDS-PLL Phase Shifter Architectures for Phased Arrays: Theory and Techniques

et al. 2019

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The main purpose of this paper is to review the framework behind direct digital synthesizer phase-locked loops (DDS-PLLs), as well as to provide a set of novel techniques that can be used during the development and the deployment of phased arrays based on local oscillator (LO) phase shifting approaches. A beam steering transmitter prototype employing our revised DDS-PLL architecture and the experimental results obtained during its characterization are presented. The main contribution of the proposed implementation consists in showing that the output phase increments of the DDS-PLL are unaffected by the frequency multiplication operated by the PLL. The proposed prototype is centered at 3.350 GHz and allows to independently set the phase of its four LOs at 2.453 GHz with an 8-bit resolution. The DDS-PLL architecture is frequency-independent, and the modular structure of its phase control units allows to achieve different phase resolutions with a very small redesign effort. INDEX TERMS Beam steering transmitter, DDS-PLL, direct digital synthesizer (DDS), phase-locked loop (PLL), phase shifter.

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Section: Resultsmentioning

confidence: 99%

“…7. The design of the LO synthesizers and their PCB implementation have been presented in [22]. Its size is 240x100-mm 2 and its reference inputs and RF outputs are spaced apart by 61.15-mm.…”

Section: Beam Steering Transmitter Prototypementioning

confidence: 99%