Results 301 to 310 of about 31,808 (349)
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A Broadband Coaxial Ridged Horn Antenna
19th European Microwave Conference, 1989, 1989The bandwidth of a circular ora rectangular waveguide can he enhanced by introducing ridges into the waveguide. In this work, ridges are introduced into the coaxial waveguide with the same intention. Simple formulae are given to calculate the cut-off frequencies of the coaxial ridge waveguide.
A. Haal, U. Kazak
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The (un)expected benefits of coaxial antennas for MRI
2021 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2021Shielded-coaxial-cable loops, or high impedance coils (HICs), are receiving increased interest in the MRI community because of performance benefits such as better decoupling, lower peak SAR in transmit mode and a flexible coil design. In this work, we summarize our recent efforts in understanding and applying coaxial conductors for antenna design in ...
Bart Romke Steensma +4 more
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A modular coaxial colinear antenna
Sixth International Conference on `HF Radio Systems and Techniques', 1994A new type of coaxial colinear antenna (CoCo) is introduced. The design approach is based on separating individual monopoles by inserting junction boxes. With this method, each junction is localised and then its matching can be accomplished. The antenna is built up by connecting coaxial elements on junction boxes.
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Bandwidth investigation of coaxial colinear antennas
Ninth International Conference on Antennas and Propagation (ICAP), 1995Coaxial colinear (CoCo) antennas were considered, for decades, just as being wire antennas. However, the concept of the colinear phased array has been introduced by a number of authors. The principle of dual behaviour (transmission line-cylindrical antenna) allowed a better comprehension of these antennas.
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The coaxial-collinear antenna of advanced manufacturability
2005 15th International Crimean Conference Microwave & Telecommunication Technology, 2005The results of investigation the coaxial-collinear antenna with advanced manufacturability are presented. The antenna is a packed cophasal array on the coaxial feeder basis having circumferential slots in its outer conductor, spaced with distances /spl lambda//sub /spl epsi// and 2/spl lambda//sub /spl epsi// and coaxially covered with half-wavelength ...
B.A. Mishoostin +2 more
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An Probe Antenna Using Coaxial Cable
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM), 2019Sensor antenna is an interesting concept for nondestructive testing. For example, we can observe the stats of reinforced concrete (RC) in buildings. However, if the concrete gets moisture by rain and so on, the quality of concrete will deteriorate. To avoid this, we have to regularly monitor the quality of the concrete.
Hibiki Hamaguchi +2 more
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Conformal antennas with coaxial probe feed
2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON), 2016The article presents analysis of the impact of cylindrical antennas radius of curvature on their basic parameters and characteristics of radiation. For the selected frequency range there was designed planar and cylindrical microstrip antenna with coaxial feed. For conformal surface radius length was varied in the range 0.2 – 50 Λ0.
Marek Bugaj +3 more
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Coupling Between a Radiating Coaxial Cable and a Dipole Antenna
IEEE Transactions on Communications, 1975The coupling loss between a coaxial cable with a circumferential gap and a dipole antenna is analyzed. The numerical results have application to continuous-access guided communication (CAGC) and to related leaky feeder systems now being used in intramine communications.
David A. Hill, James R. Wait
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Complex Antenna Factors of Resistor Loaded Dipole Antennas with Coaxial Cable Balun
IEICE Transactions on Communications, 2006This letter presents the characteristics of complex antenna factors of a resistor loaded dipole antenna with a balun consisting of two coaxial feeders (coaxial cable balun). The resistor loading is used to realize dipole antennas with higher fidelity than unloaded dipole equivalents.
Ki-Chai Kim, Takashi Iwasaki
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Coaxial feed‐type microstrip patch antenna with variable antenna height
Electronics and Communications in Japan (Part I: Communications), 2003AbstractThis paper describes a functional antenna with variable antenna height in which the coaxial feed section of the microstrip patch antenna is engineered. This is a new type of antenna combining mechatronic technology and the microstrip antenna so that the resonant frequency of the antenna can be varied by mechanical adjustment of the antenna ...
Kazuhiro Kitatani, Sadahiko Yamamoto
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