Reconfigurable Photonic Feed for Sinuous Antenna

Emami, Hossein; Sarkhosh, Niusha; Lara, E. Reynoso; Mitchell, Arnan

doi:10.1109/jlt.2012.2205368

Cited by 17 publications

(6 citation statements)

References 10 publications

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“…Substituting (11) into (12), the PD current can be written as (13) The dc component of the PD current can be calculated from (13) as follows: (14) Ignoring all terms with fourth-order or higher coefficients of , the dc component of the PD current can be simplified as (15) Finally, the output voltage can be calculated as (16) where and denote the load impedance of the PD and the gain of the LPF, respectively. Replacing the value of in (16) and taking into account that , can be calculated as (17) From (17), it can be inferred that the output of the system is a low-frequency voltage which is a function of RF frequency .…”

Section: B Ifm Modelmentioning

confidence: 99%

“…Many investigations have thus been conducted to implement ultra broadband IFM systems specifically using microwave photonics technology owing to its capability of wideband signal processing [9]- [14]. In an attempt to measure microwave frequency, a frequencydependent dispersive medium was employed to measure the frequency of an RF tone modulating two optical carriers, and a bandwidth of 20 GHz was achieved [15].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improved Dynamic Range Microwave Photonic Instantaneous Frequency Measurement Based on Four-Wave Mixing

Emami

Ashourian

2014

IEEE Trans. Microwave Theory Techn.

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An improved dynamic range instantaneous frequency measurement system based on four-wave mixing effect in a highly nonlinear fiber was practically demonstrated. A closed-form model was developed to predict the behavior of the system. The model predicted that the system output would have a low frequency voltage which was a function of RF input frequency. The system performance was also practically demonstrated. The system characterization showed a 0.04-40-GHz frequency measurement range with 51-dB dynamic range for 100-MHz measurement error at the end of the band. A maximum relative measurement error of 0.35% was achieved over the entire frequency range. This dynamic range was achieved by employing the lock-in amplification technique.Index Terms-Microwave measurement, microwave optical design, microwave photonics, optical fibers.

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Section: B Ifm Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improved Dynamic Range Microwave Photonic Instantaneous Frequency Measurement Based on Four-Wave Mixing

Emami

Ashourian

2014

IEEE Trans. Microwave Theory Techn.

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“…Circular polarization reconfigurable antennas are achieved by varying polarization between left-hand circular and right-hand circular [31][32][33][34][35][36][37][38][39]. The antennas switching between the linear polarization and circular polarization are mixed polarization reconfigurable antennas [40][41][42][43][44][45][46][47][48][49][50][51].…”

Section: Classification and Technologies Of Reconfigurable Antennasmentioning

confidence: 99%

Overview on Multipattern and Multipolarization Antennas for Aerospace and Terrestrial Applications

Chen

Jiang

Chen

et al. 2013

International Journal of Antennas and Propagation

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In recent years, reconfigurable antennas, with the ability to radiate wave in more than one pattern and polarization, play a great role in modern telecommunication systems. Compared with conventional antennas, multipattern and multipolarization antennas have more advantages and better prospects. They can be used to improve system gain and security, satisfy system requirements, avoid noisy environment, and adapt to the environment flexibly. This paper discusses different patterns and polarizations of reconfigurable antennas according to current research work in this area. In the opinion of this paper, the radiation pattern states of antennas include beam direction, shape, and gain. The polarization states of antennas include horizontal/vertical linear, ±slant 45° linear, left-hand or right-hand circular polarized. Different multipattern and multipolarization antennas with various structures and working mechanisms are compared and discussed. Multipattern and multipolarization antennas have been well applied for aerospace and terrestrial applications, such as dynamic scenarios, adaptive beam scanning, and multiple-input-multiple-output (MIMO) systems.

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“…One application to which recently much attention is attracted is MWP assisted electronic warfare (EW) systems [11][12][13]. Some instances are instantaneous frequency measurement receivers [12][13][14][15][16][17][18][19], scanning receivers [20,21], channelized receivers [22][23][24], and reconfigurable beam-forming systems [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Standalone Microwave Photonics Doppler Shift Estimation System

Emami

Hajihashemi

Alavi

2016

J. Lightwave Technol.

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A standalone microwave photonics system for Doppler frequency measurement purposes is conceived and demonstrated practically. The system exhibits a maximum of 1.61% relative error in Doppler frequency estimation at the worst case. Utilization of all optical mixing has enabled RF frequency independent operation. The system is thus capable of operating at any radar carrier frequency up to 40 GHz. This makes it a perfect candidate for various types of photonic-based radars and frequency agility systems.Index Terms-Frequency estimation, frequency measurement, Doppler radar, Doppler measurement. 0733-8724 (c)

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Reconfigurable Photonic Feed for Sinuous Antenna

Cited by 17 publications

References 10 publications

Improved Dynamic Range Microwave Photonic Instantaneous Frequency Measurement Based on Four-Wave Mixing

Improved Dynamic Range Microwave Photonic Instantaneous Frequency Measurement Based on Four-Wave Mixing

Overview on Multipattern and Multipolarization Antennas for Aerospace and Terrestrial Applications

Standalone Microwave Photonics Doppler Shift Estimation System

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