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2017 IEEE Microwaves, Radar and Remote Sensing Symposium (MRRS), 2017
The design and operation principle of the directional antenna system for tactical unmanned aerial vehicles are considered. Simulation and experimental results are present.
L. V. Sibruk +3 more
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The design and operation principle of the directional antenna system for tactical unmanned aerial vehicles are considered. Simulation and experimental results are present.
L. V. Sibruk +3 more
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Performance of TCP with Directional Antennas
Proceedings. 2006 31st IEEE Conference on Local Computer Networks, 2006Transport control protocol (TCP) is the most widely used transport protocol in the Internet. However, there are several performance issues related to TCP when used in wireless ad hoc networks. We compare the performance of TCP flows with directional and omni-directional antennas.
Sivaram Cheekiralla, Daniel W. Engels
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Omnidirectional chargability with directional antennas
2016 IEEE 24th International Conference on Network Protocols (ICNP), 2016Wireless Power Transfer (WPT) has received more and more attentions because of its convenience and reliability. In this paper, we first propose the notion of omnidirectional charging by which an area is omnidirectionally charged if a device with directional antennas at any position in the area with any orientation can be charged by directional chargers
Haipeng Dai 0001 +5 more
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Direction finding with a rotating antenna
2012 20th Signal Processing and Communications Applications Conference (SIU), 2012Finding the direction of the emitters is a problem to be solved in many areas. One of the methods used for that purpose is that using a rotating directional antenna and obtaining the direction estimate by processing the measured signal amplitudes. Direction estimation, in principle, is based on the own antenna pattern modulation on the measured signal.
Berkin Yildirim, Aydin Bayri, Gokhan Gok
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Directional ZigZag: Neighbor Discovery with Directional Antennas
2015 IEEE Global Communications Conference (GLOBECOM), 2014We introduce a new neighbor discovery method for wireless nodes with adaptive antennas, called "directional ZigZag." Adaptive antennas are capable of electronically changing their gain pattern and in particular form beams and steer them in arbitrary directions. Despite improving range, this makes neighbor discovery more difficult.
Arash Saber Tehrani +2 more
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IEEE Antennas and Propagation Magazine, 2017
We derive a general fundamental directivity limitation formula that applies to nonsuperreactive antennas of any size that fit within a minimum sphere of any given radius rmin. The derivation is done by using a new concept: the degrees of freedom (DoF) of the field radiated by arbitrary sources within the minimum sphere must be twice the maximum ...
Kildal, Per-Simon +2 more
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We derive a general fundamental directivity limitation formula that applies to nonsuperreactive antennas of any size that fit within a minimum sphere of any given radius rmin. The derivation is done by using a new concept: the degrees of freedom (DoF) of the field radiated by arbitrary sources within the minimum sphere must be twice the maximum ...
Kildal, Per-Simon +2 more
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Antenna orientation and range assignment in WSNs with directional antennas
IEEE INFOCOM 2016 - The 35th Annual IEEE International Conference on Computer Communications, 2016Consider a set S of nodes in the plane such that the unit-disk graph G(S) spanning all nodes is connected. Each node in S is equipped with a directional antenna with beam-width θ = π/2. The objective of the Directional Antenna Orientation (AO) problem concerning symmetric connectivity is to determine an orientation of the antennas with a minimum ...
Tien Tran, Min Kyung An, Dung T. Huynh
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A Novel Approximate Antenna Pattern for Directional Antenna Arrays
IEEE Wireless Communications Letters, 2018The antenna pattern model plays a key role in evaluating the performance benefits of directional antenna arrays. In this letter, we propose a novel antenna pattern, named multi-cosine antenna pattern , to approximate the actual antenna pattern, and apply it to millimeter wave (mm-wave) networks.
Na Deng, Martin Haenggi
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The wave antenna: A new type of highly directive antenna
Journal of the American Institute of Electrical Engineers, 1923Review of the Subject. — A small bungalow in a grove of oak trees just outside of Riverhead, Long Island, with a line of poles along a country road, carrying two copper wires, and ending by a stream nine miles southwest of Riverhead, — this in brief describes the Atlantic coast “ear” of the Radio Corporation of America, where the wireless messages from
Harold H. Beverage +2 more
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An antenna to direct light to opposite directions
Optics Communications, 2013Abstract We propose that the split ring resonator can be used as an optical antenna to direct light emitted by an electric source to opposite directions at different wavelengths. We demonstrate the directional effects through numerical simulations and explain the phenomena by a two-dipole model.
Yao Jie, Yang Li, Ye Yonghong
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