Helical Antenna
Gain Enhancement of the Helical Antenna by Effecting TurnSpacing
... Abstract— Helical antennas have been widely used as simple and practical radiators over the last few ...a helical antenna alone, a helical antenna can also be used as a feed for a ...
5
K-Band 4×4 RHCP Helical Antenna Array Using LTCC Technology
... This paper designs a 4 × 4 LTCC RHCP helical antenna with a measured 1.5 dB-AR bandwidth of more than 7.8%, which uses sequential rotation method to enhance AR bandwidth. To obtain a good performance of ...
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Feed Signal Influence and Potential Performances of a Compact Radiation Source Based on a Helical Antenna
... dipole antenna is detrimental. The use of a directional antenna may improve performance really significantly focusing the radiation in a preferred ...axial helical antenna (compactness, high ...
10
High Gain Axial-Mode Helical Antenna with Circular Metal Disk
... cylinder helical, cone helical and sphere ...these helical antennas, axial-mode can cause radiation along with helical ...axial-mode helical antenna can be widely applied in ...
11
A Folded Printed Quadrifilar Helical Antenna Employing a Compact Feeding Network
... quadrifilar helical antenna (FPQHA) with an integrated and compact feeding network is ...proposed antenna is miniaturized of about ...proposed antenna design and experimental results are ...
5
A Very Compact Normal Mode Multiloop Helical Antenna with Enhanced Bandwidth
... an antenna becomes an important characteristic when receiving signals in bands with long ...of antenna performance; impedance and ...telescopic antenna with adjustable length which can operate as a ...
7
Optimized Design of Helical Antenna with Parasitic Patch for L-Band Satellite Communications
... L b = 8 mm, and the height of the feed wire above the ground plane was H sub = 5 mm. In order to achieve much wider circular polarization bandwidth, a parasitic patch was introduced into the design of the helical ...
5
A Broadband Printed Quadrifilar Helical Antenna with a Novel Compact Broadband Feeding Network
... quadrifilar helical antenna (BPQHA) integrated with a broadband feeding network for satellite communications is ...satisfactory antenna characteristics over a wide bandwidth are ...the ...
7
Miniature Folded Printed Quadrifilar Helical Antenna with Integrated Compact Feeding Network
... Abstract—A miniature folded printed quadrifilar helical antenna (FPQHA) using a novel compact feeding network is proposed. Folding and meandering techniques are used to obtain 66% of size reduction for the ...
6
Design, Assembly and Testing of a High Gain LHCP Helical Antenna for Reception of Reflected GPS Signals
... the antenna gain and summarized extensive numerical modelling calculations for the helical ...increasing antenna length than the simple Kraus formula would ...the helical antenna as a ...
14
Bi Directional Excitation of Radio Frequency Waves Using a Helical Antenna in Non Uniform Plasmas towards a Compact Magnetoplasma Thruster
... two helical antennas are equipped to produce and heat plasmas with separate radio frequency ...a helical antenna, which is used to launch one wave mode in one direction so far, exhibits ...
11
High Power 30 Element Helical Antenna Array
... short helical antenna is chosen to be the antenna element, hence the array is also circularly ...These antenna elements are placed on the upper side of the radial-line, and the waveguide wall ...
7
A Novel Printed Helical Antenna for a Circularly Polarized Tilted Beam
... printed helical antenna (PHA) for a circularly polarized (CP) titled beam is ...PHA’s helical arm, the antenna radiates a CP titled ...the antenna, a matching network composed of a 50 Ω ...
5
A Mathematical Derivation of Equivalent Model of Normal Mode Helical Antenna
... mode helical antenna (NMHA) is presented to provide an equivalent ...current antenna, and the result leads to an equivalent model that is a combination of the electric dipole and the magnetic dipole, ...
11
High Power 12-Element Triangular-Grid Rectangular Radial Line Helical Array Antenna
... profile helical antenna used in [2, 4] has quite favorable radiation ...the antenna radiation performance and power handling ...the helical antenna is optimized, as shown in Figure ...
8
Dual Gain control of the helical feed parabolic Reflector antenna
... A helical antenna can be used as a feed for a parabolic dish for higher ...The helical antenna can be an excellent feed for a dish, with the advantage of circular polarization ...
6
Modelling and analyses of helical milling process
... the helical milling in the aspects of the influences of cutting parameters on cutting force, cutting temperature, tool wear and quality of the machined surface ...
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Effect of torsion in a helical pipe flow
... additional term of Since the secondary flow cannot be described by a stream function in the present case, the deviation of stream lines compared to toroidal pipe flow cannot be studied, [r] ...
8
Improved Design of a Cartridge-Type Helical Blanket System for the Helical Fusion Reactor FFHR-b1
... the helical reactor, how to con- struct the complicated structure within a realistic period of time is also an important ...cartridge-type helical blanket system named the CARDISTRY-B (cartridges divided ...
24
Conformational dynamics is more important than helical propensity for the folding of the all alpha-helical protein Im7
... nascent helical structure that favours folding by the diffusion-collision mechanism 6 , in which marginally stable elements of secondary structure dock together aiding their stabilization and promoting formation ...
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