Compact and Broadband Millimeter-Wave Electrically Tunable Phase Shifter Combining Slow-Wave Effect With Liquid Crystal Technology

Franc, Anne-Laure; Karabey, Onur Hamza; Rehder, Gustavo P.; Pistono, Emmanuel; Jakoby, Rolf; Ferrari, Philippe

doi:10.1109/tmtt.2013.2282288

Cited by 71 publications

(40 citation statements)

References 35 publications

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“…RF phase shifters are key components in integrated mmWave phased arrays. Some important considerations regarding the phase shifter design are the noise figure, power consumption, insertion loss, [49]. Active phase shifters have a small footprint but generally cause nonlinearity problems resulting in a high noise figure.…”

Section: Power Consumption Modelmentioning

confidence: 99%

Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches?

et al. 2016

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Hybrid analog/digital MIMO architectures were recently proposed as an alternative for fully-digitalprecoding in millimeter wave (mmWave) wireless communication systems. This is motivated by the possible reduction in the number of RF chains and analog-to-digital converters. In these architectures, the analog processing network is usually based on variable phase shifters. In this paper, we propose hybrid architectures based on switching networks to reduce the complexity and the power consumption of the structures based on phase shifters. We define a power consumption model and use it to evaluate the energy efficiency of both structures. To estimate the complete MIMO channel, we propose an open loop compressive channel estimation technique which is independent of the hardware used in the analog processing stage. We analyze the performance of the new estimation algorithm for hybrid architectures based on phase shifters and switches. Using the estimated, we develop two algorithms for the design of the hybrid combiner based on switches and analyze the achieved spectral efficiency. Finally, we study the trade-offs between power consumption, hardware complexity, and spectral efficiency for hybrid architectures based on phase shifting networks and switching networks. Numerical results show that architectures based on switches obtain equal or better channel estimation performance to that obtained using phase shifters, while reducing hardware complexity and power consumption. For equal power consumption, all the hybrid architectures provide similar spectral efficiencies.

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Section: Power Consumption Modelmentioning

confidence: 99%

Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches?

et al. 2016

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“…As can be seen the SLL is strongly dependent on the loss variation value (| IL| is defined as the phase shifter maximum insertion loss variation across all the phase shift values). Different types of low cost and high performance phase shifters have been presented recently [1], [2]; however, they have some practical limitations in terms of size, loss or bandwidth. We have proposed a phase shifter that uses a high dielectric constant Barium Lanthanide Tetratitanates (BLT) BLT ceramics [3].…”

Section: Introductionmentioning

confidence: 99%

Wide-band phase shifter for mmWave phased array applications

Abdellatif

Aziz

Ranjkesh

et al. 2015

Global Symposium on Millimeter-Waves (GSMM)

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This paper proposes a new wide-band phase shifter for mmWave phased array applications. The proposed phase shifter is compact and has both a low absolute insertion loss and low insertion loss variation. The wide-band frequency characteristics is obtained by simple but effective matching technique. The phase shifter is based on loading a CPW line with a high dielectric constant BLT ceramic. For a sample with a length of 4mm, a phase shift of 360º at 33 GHz is obtained while the average insertion loss is less than 1.4dB for a bandwidth of more than 20 GHz.

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“…Compared with ferroelectric crystals (e.g., (Ba,Sr)TiO 3 ), the nematic LC has a lower bias voltage, which makes it more suitable for portable reconfigurable electromagnetic wave device design [11][12][13][14]. In recent years, nematic LCs have been widely applied for tunable filters [15][16][17][18], for tunable phase shifters [19][20][21], for active metamaterials [22][23][24][25], and for frequency [26][27][28], polarization [21,29], or radiation pattern reconfigurable [30][31][32][33][34][35] antennas. Phase shifts of LC phase shifters are usually about 150°and 300°in the microwave [7] and millimetre-wave [36,37] bands, respectively.…”

Section: Introductionmentioning

confidence: 99%

Radiation Pattern Reconfigurable Waveguide Slot Array Antenna Using Liquid Crystal

Shi

Zhu

et al. 2018

International Journal of Antennas and Propagation

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In this paper, we proposed a radiation pattern reconfigurable waveguide slot array antenna using liquid crystal (LC). Together with the waveguide slot, the designed complementary electric-field-coupled resonator functions like a switch controlled by the dielectric constant of the LC, which can control the antenna element to radiate or not. Thus, the array factor and radiation pattern can be manipulated. The proposed antenna was simulated, fabricated, and measured. Its radiation direction can be reconfigured to 46° or 0° at about 15 GHz.

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Compact and Broadband Millimeter-Wave Electrically Tunable Phase Shifter Combining Slow-Wave Effect With Liquid Crystal Technology

Cited by 71 publications

References 35 publications

Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches?

Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches?

Wide-band phase shifter for mmWave phased array applications

Radiation Pattern Reconfigurable Waveguide Slot Array Antenna Using Liquid Crystal

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