Continuously Frequency-Tunable Horn Filtennas Based on Dual-Post Resonators

This work reports the concept and development of two mechanically frequency-tunable horn filtennas for microwave and millimeter-waves. Our design approach relies on the integration of a horn antenna with a mechanically tunable filter based on dual-post resonators. The proposed filtennas have been manufactured and experimentally characterized, by means of reflection coefficient, radiation pattern, and gain. Measurements demonstrate that both filtennas have a tuning ratio of approximately 1.37 with continuous adjustment. The first prototype operates from 2.56 to 3.50 GHz, whereas in the second one the bandwidth is from 17.4 to 24.0 GHz. In addition, the higher-frequency filtenna has been implemented in a 5.0-meter-reach indoor environment, using a 16-QAM signal at 24 GHz. The best configuration in terms of performance resulted in a root mean square error vector magnitude (EVMRMS) and antenna radiation efficiency of 3.69% and 97.0%, respectively.

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Bidirectional single sideband transmission of Millimeter Waves over Fiber for 5G Mobile Networks

TecnoLógicas ◽

10.22430/22565337.1053 ◽

2018 ◽

Vol 21 (43) ◽

pp. 15-26 ◽

Cited By ~ 1

Author(s):

Alejandro Patiño-Carrillo ◽

Gustavo Puerto-Leguizamón ◽

Carlos Suárez-Fajardo

Keyword(s):

Mobile Networks ◽

Millimeter Waves ◽

Network Architecture ◽

Mobile Systems ◽

Error Vector Magnitude ◽

Downlink Transmission ◽

Single Sideband ◽

Single Sideband Modulation ◽

Vector Magnitude

This study proposes, experimentally demonstrates, and simulates a network architecture for the transport of millimeter waves (MMW) based on Radio over Fiber (RoF) techniques for the transport of signals in the fronthaul segment of the next 5G generation mobile systems. Such approach exploits the benefits of bidirectional single-sideband modulation in order to generate an optical subcarrier for the downlink transmission and a second subcarrier for the transport of the uplink services, as well as the centralization of optical sources. The proposed architecture is evaluated based on the analyses of the Bit Error Rate (BER) performance and Error Vector Magnitude (EVM) in both downlink and uplink. Likewise, simulation modeling of the approach was conducted in order to evaluate the quality of the MMW signals at different frequencies available in the MMW spectrum. The results show a power penalty lower than 2 dB for a 1x1-12 BER and an EVM below 12% within a power margin of 6 dB, which demonstrates the feasibility of the approach.

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Non-Ionizing Millimeter Waves Non-Thermal Radiation of Saccharomyces cerevisiae—Insights and Interactions

Applied Sciences ◽

10.3390/app11146635 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6635

Author(s):

Ayan Barbora ◽

Shailendra Rajput ◽

Konstantin Komoshvili ◽

Jacob Levitan ◽

Asher Yahalom ◽

...

Keyword(s):

Saccharomyces Cerevisiae ◽

Cell Division ◽

Millimeter Waves ◽

Model Organism ◽

Horn Antenna ◽

Colony Growth ◽

Genetic Alterations ◽

Power Delivery ◽

Repair Gene ◽

Safety Standards

Non-ionizing millimeter-waves (MMW) interact with cells in a variety of ways. Here the inhibited cell division effect was investigated using 85–105 GHz MMW irradiation within the International Commission on Non-Ionizing Radiation Protection (ICNIRP) non-thermal 20 mW/cm2 safety standards. Irradiation using a power density of about 1.0 mW/cm2 SAR over 5–6 h on 50 cells/μL samples of Saccharomyces cerevisiae model organism resulted in 62% growth rate reduction compared to the control (sham). The effect was specific for 85–105 GHz range and was energy- and cell density-dependent. Irradiation of wild type and Δrad52 (DNA damage repair gene) deleted cells presented no differences of colony growth profiles indicating non-thermal MMW treatment does not cause permanent genetic alterations. Dose versus response relations studied using a standard horn antenna (~1.0 mW/cm2) and compared to that of a compact waveguide (17.17 mW/cm2) for increased power delivery resulted in complete termination of cell division via non-thermal processes supported by temperature rise measurements. We have shown that non-thermal MMW radiation has potential for future use in treatment of yeast related diseases and other targeted biomedical outcomes.

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Wideband Dipole Array Loaded Substrate Integrated H-Plane Horn Antenna for Millimeter Waves

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2017.2741025 ◽

2017 ◽

Vol 65 (10) ◽

pp. 5211-5219 ◽

Cited By ~ 17

Author(s):

Jingxue Wang ◽

Yujian Li ◽

Lei Ge ◽

Junhong Wang ◽

Meie Chen ◽

...

Keyword(s):

Millimeter Waves ◽

Horn Antenna

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Parallel PWMs Based Fully Digital Transmitter with Wide Carrier Frequency Range

The Scientific World JOURNAL ◽

10.1155/2013/373429 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Bo Zhou ◽

Kun Zhang ◽

Wenbiao Zhou ◽

Yanjun Zhang ◽

Dake Liu

Keyword(s):

Carrier Frequency ◽

Pulse Width ◽

Power Efficiency ◽

Intermediate Frequency ◽

Delay Lines ◽

Error Vector Magnitude ◽

Frequency Range ◽

Digital Transmitter ◽

High Power Efficiency ◽

Vector Magnitude

The carrier-frequency (CF) and intermediate-frequency (IF) pulse-width modulators (PWMs) based on delay lines are proposed, where baseband signals are conveyed by both positions and pulse widths or densities of the carrier clock. By combining IF-PWM and precorrected CF-PWM, a fully digital transmitter with unit-delay autocalibration is implemented in 180 nm CMOS for high reconfiguration. The proposed architecture achieves wide CF range of 2 M–1 GHz, high power efficiency of 70%, and low error vector magnitude (EVM) of 3%, with spectrum purity of 20 dB optimized in comparison to the existing designs.

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Performance enhancement of a WCDMA/HSDPA+ receiver via minimizing error vector magnitude

2013 IEEE International Test Conference (ITC) ◽

10.1109/test.2013.6651881 ◽

2013 ◽

Cited By ~ 1

Author(s):

Wei Gao ◽

Chris Liu

Keyword(s):

Performance Enhancement ◽

Error Vector Magnitude ◽

Error Vector ◽

Vector Magnitude

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A low-loss, continuously tunable microwave notch filter

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078715000562 ◽

2015 ◽

Vol 8 (3) ◽

pp. 567-572 ◽

Cited By ~ 1

Author(s):

Öncel Acar ◽

Tom K. Johansen ◽

Vitaliy Zhurbenko

Keyword(s):

Software Defined Radio ◽

Notch Filter ◽

Tunable Filter ◽

Low Loss ◽

Tuning Method ◽

Unmet Demand ◽

Tuning Ratio ◽

Tunable Microwave

The development in high-end microwave transceiver systems toward the software defined radio has brought about the need for tunable frontend filters. Although the problem is being tackled by the microwave community, there still appears to be an unmet demand for practical tunable filter technologies. With this motivation, this work presents a tuning method that delivers a resonator Q0of 2000–3621 within a minimum tuning ratio of 1:1.42. A continuously tunable notch filter based on this tuning method is presented. The design is manufactured, measured, and verified. It is shown that the tuning technology compares favorably to other selected technologies.

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