High gain antenna systems for millimeter wave radars with combined electronical and mechanical beam steering

Tolkachev, A. A.; Денисенко, В. В.; Shishlov, A. V.; Shubov, A.G.

doi:10.1109/past.1996.566097

Cited by 36 publications

(20 citation statements)

References 2 publications

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“…Efficient signal transmission (Tx) and reception has been made possible via advances in low-power complementary metal–oxide–semiconductors radio-frequency (RF) circuits with a large number of miniaturized antenna elements inside each mm-wave device [2]. Millimeter- wave multiarray (mArr) systems can achieve higher gain using electrically steerable arrays, where the amplitude and phase of each antenna element is changed for what is called beamsteering or beamforming , as illustrated in Figure 1 [3]. These mArr systems are being developed and placed in a multitude of wireless devices [1].…”

Section: Overview Of Millimeter-wave Devices Devicesmentioning

confidence: 99%

Prospects for Millimeter-Wave Compliance Measurement Technologies [Measurements Corner]

Alon

Gabriel

Cho

et al. 2017

IEEE Antennas Propag. Mag.

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Section: Overview Of Millimeter-wave Devices Devicesmentioning

confidence: 99%

Prospects for Millimeter-Wave Compliance Measurement Technologies [Measurements Corner]

Alon

Gabriel

Cho

et al. 2017

IEEE Antennas Propag. Mag.

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“…Reconfiguration delay is a widespread phenomenon that is observed in many practical telecommunication systems [3], [6], [27], [46]. In satellite networks where multiple mechanically steered antennas are providing service to ground stations, the time to switch from one station to another can be around 10 ms [6], [41]. Similarly, in optical communication systems, laser tuning delay for transceivers and optical switching delay can take significant time ranging from microseconds to tens of milliseconds depending on technology [8], [27].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, in optical communication systems, laser tuning delay for transceivers and optical switching delay can take significant time ranging from microseconds to tens of milliseconds depending on technology [8], [27]. In wireless networks, delays for electronic beamforming or channel switching that occurs in phased-lock loops in oscillators can be more than 200 s [3], [6], [41], [46]. Worse yet, such small delay is often impossible to achieve due to delays incurred during different processing tasks such as channel estimation, signal-to-interference ratio, transmit diversity and power control calculations in the physical layer [3], [18], and stopping and restarting the interrupt service routines of various drivers in upper layers [3], [33].…”

Section: Introductionmentioning

confidence: 99%

Scheduling in Networks With Time-Varying Channels and Reconfiguration Delay

Çelik

Modiano

2015

IEEE/ACM Trans. Networking

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We consider the optimal control problem for networks subjected to time-varying channels, reconfiguration delays, and interference constraints. We show that the simultaneous presence of time-varying channels and reconfiguration delays significantly reduces the system stability region and changes the structure of optimal policies. We first consider memoryless channel processes and characterize the stability region in closed form. We prove that a frame-based Max-Weight scheduling algorithm that sets frame durations dynamically, as a function of the current queue lengths and average channel gains, is throughput-optimal. Next, we consider arbitrary Markov-modulated channel processes and show that memory in the channel processes can be exploited to improve the stability region. We develop a novel approach to characterizing the stability region of such systems using state-action frequencies, which are stationary solutions to a Markov Decision Process (MDP) formulation. Moreover, we develop a dynamic control policy using the state-action frequencies and variable frames whose lengths are functions of queue sizes and show that it is throughput-optimal. The frame-based dynamic control (FBDC) policy is applicable to a broad class of network control systems, with or without reconfiguration delays, and provides a new framework for developing throughput-optimal network control policies using state-action frequencies. Finally, we propose Myopic policies that are easy to implement and have better delay properties as compared to the FBDC policy.

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“…These elements can be excited whether by a feeding network or by multiple feeding source. Furthermore, by controlling the phase in each element, the main beam can be steered in any direction [2,3].…”

Section: Introductionmentioning

confidence: 99%

Beam scanning folded reflectarray antenna with shifted waveguide positions

Yusoff

Sauleau

Hamid

et al. 2013

2013 IEEE International RF and Microwave Conference (RFM)

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A folded reflectarray antenna with scanning beam ability is studied. In this configuration, the antenna waveguide feed position is shifted in x and y directions to tilt the antenna beam in E and H planes. The simulated results show that longer the shifted distances, the higher the tilted angle can be reached. The test antenna is designed at 60GHz. Index Terms -Folded reflectarray antenna, Beam scanning, Twist reflectarray, linear polarizing grid and rectangular waveguide.

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High gain antenna systems for millimeter wave radars with combined electronical and mechanical beam steering

Cited by 36 publications

References 2 publications

Prospects for Millimeter-Wave Compliance Measurement Technologies [Measurements Corner]

Prospects for Millimeter-Wave Compliance Measurement Technologies [Measurements Corner]

Scheduling in Networks With Time-Varying Channels and Reconfiguration Delay

Beam scanning folded reflectarray antenna with shifted waveguide positions

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