A tunable all-pass MMIC active phase shifter

Viveiros, D.; Consonni, Denise; Jastrzebski, Adam K.

doi:10.1109/tmtt.2002.801315

Cited by 33 publications

(29 citation statements)

References 12 publications

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“…Figure 9 demonstrate a broadband phase shifter that contains 6 highpass tees that center at two frequencies: 5GHz and 1 GIGHz. The composite response is relatively flat over the [4][5][6][7][8][9][10][11][12] GHz range, with maximum phase shift near the center frequencies of the individual sections as expected. A maximum of±1.6dB variation in insertion loss over all bias states occurs between 9-10 GHz.…”

Section: Single Section Phase Shiftermentioning

confidence: 59%

“…It is well known that all-pass networks make excellent phase shifters, providing a constant phase shift and tightly grouped insertion loss within the design bandwidth. Circuits using this approach have been demonstrated with diode varactors [2], GaAs FETS [3,4], and BST materials [5]. This paper describes how such networks can be used to implement broadband -360 degree phase shifters, by cascading several all-pass sections with staggered center frequencies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compact Analog Phase Shifters using Thin-Film (Ba,Sr)TiO3 Varactors

Chen

Forse

Cardona

et al. 2007

2007 IEEE/MTT-S International Microwave Symposium

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-This paper describes the realization of compact 360 degree phase-shifter MMICs using thin-film BST varactors in a series cascade of all-pass networks. Unlike conventional delayline structures, all-pass networks provide constant phase shift with small variation of insertion loss. In similar fashion, very broadband phase-shifters can be implemented by cascading allpass networks with staggered center-frequencies. Using a thinfilm BST technology for the varactors, extremely compact and low-cost phase-shifter structures have been developed. Selected results are shown in the 1-30GHz range.

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Section: Single Section Phase Shiftermentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Compact Analog Phase Shifters using Thin-Film (Ba,Sr)TiO3 Varactors

Chen

Forse

Cardona

et al. 2007

2007 IEEE/MTT-S International Microwave Symposium

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“…Phase shifters have wide spread applications [1][2][3], in particular, 90°phase shifters are used in wireless communication for single side band generation, IQ modulation and image rejection. Digital implementation of 90°p hase shifters is in high demand as many of the digital communication systems use FPGAs [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Efficient implementation of 90° phase shifter in FPGA

Duraiswamy

Bauwelinck

Vandewege

2011

EURASIP J. Adv. Signal Process.

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In this article, we present an efficient way of implementing 90°phase shifter using Hilbert transformer with canonic signed digit (CSD) coefficients in FPGA. It is implemented using 27-tap symmetric finite impulse response (FIR) filter. Representing the filter coefficients by CSD eliminates the need for multipliers and the filter is implemented using shifters and adders/subtractors. The simulated results for the frequency response of the Hilbert transformer with infinite precision coefficients and CSD coefficients agree with each other. The proposed architecture requires less hardware as one adder is saved for the realization of every negative coefficient compared to convectional CSD FIR filter implementation. Also, it offers a high accuracy of phase shift.

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“…The digital phase shifter provides a constant phase over a specific bandwidth and the analog phase shifter provides continuously controlled phase shift over a wide range of frequencies [1]. Various topologies have been proposed for the development of phase shifters [2]- [3]. The first topology is the distributed type phase shifter with loaded transmission lines is widely used due to its low insertion loss [4].…”

Section: Introductionmentioning

confidence: 99%