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Supplier: VAST STOCK CO., LIMITED
Description: Antennas NMO HF Mount, 17' RG-58/U Dual Shield
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Supplier: Rohde & Schwarz USA, Inc.
Description: The HF Receiving Antenna R&S®HA230/403 is a versatile shortwave antenna for both horizontally and vertically polarized waves. The antenna consists of a mast head with a vertical monopole and two horizontal dipoles mounted at a 90° angle. The antenna is
- Form Factor: External
- Polarization Type: Horizontal Linear, Vertical Linear
- Primary Frequency Range: 1.5 to 30 MHz
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Supplier: Rohde & Schwarz USA, Inc.
Description: Transmission and reception of horizontally polarized waves over medium to long distances The compact, rotatable HF Antenna R&S®HL471 can be used for transmission and reception of horizontally polarized waves. Due to a transmission frequency range from 7 MHz to 30 MHz, the
- Form Factor: External
- Primary Frequency Range: 7 to 30 MHz
- Technology Type: Log Periodic Array
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Supplier: Rohde & Schwarz USA, Inc.
Description: Transmission and reception of horizontally polarized waves over medium to long distances The compact, rotatable HF Antenna R&S®HL451 can be used for transmission and reception of horizontally polarized waves. Due to a transmission frequency range from 5 MHz to 30 MHz, the
- Form Factor: External
- Primary Frequency Range: 5 to 30 MHz
- Technology Type: Log Periodic Array
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Supplier: ifm electronic gmbh
Description: For the reliable identification of ID tags on workpiece carriers and products Robust stainless steel housing for applications in mounting, feeding and handling technology Suitable for use with RFID antenna adapters to increase the ranges RFID read/write head HF for non-flush
- Applications: RFID
- Operating Temperature: -4 to 140 F
- Primary Frequency Range: 13.56 MHz
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Supplier: ifm electronic gmbh
Description: For the reliable identification of ID tags on workpiece carriers and products Robust stainless steel housing for applications in mounting, feeding and handling technology Suitable for use with RFID antenna adapters to increase the ranges RFID read/write head HF for non-flush
- Applications: RFID
- Operating Temperature: -4 to 140 F
- Primary Frequency Range: 13.56 MHz
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Supplier: ifm electronic gmbh
Description: For the reliable identification of ID tags on workpiece carriers and products Robust stainless steel housing for applications in mounting, feeding and handling technology Suitable for use with RFID antenna adapters to increase the ranges RFID read/write head HF for flush
- Applications: RFID
- Operating Temperature: -4 to 140 F
- Primary Frequency Range: 13.56 MHz
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Supplier: ifm electronic gmbh
Description: For the reliable identification of ID tags on workpiece carriers and products Robust stainless steel housing for applications in mounting, feeding and handling technology Suitable for use with RFID antenna adapters to increase the ranges RFID read/write head HF for flush
- Applications: RFID
- Operating Temperature: -4 to 140 F
- Primary Frequency Range: 13.56 MHz
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Supplier: Rohde & Schwarz USA, Inc.
Description: inputs are protected against overvoltages. Occupying only one height unit, the R&S®ASDU02 saves space in any rack. Key Facts Active multicoupler for antenna signal distribution Signal reception via modules in the HF and VHF/UHF bands Space-saving with only 1 HU
- 0º Power Divider Division: 4-Way
- Category: Active
- Divider / Combiner Type: 0º
- Frequency Range: 0.0100 to 30 MHz
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Helicopter rotor-blade modulation of antenna radiation characteristics
Rotor modulation on the magnitude and phase of the radia- tion gain pattern of an HF antenna mounted on the tail boom of a scaled helicopter model is examined in this section.
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Calculated and measured radiation characteristics of an HF loop antenna mounted upon a helicopter
As indicated above, this problem is acute at the low end of the band as a consequence of the characteristics of HF antennas mounted upon small aircraft.
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HF antennas for NVIS applications mounted to helicopters with tandem main rotor blades
In this work, we focus on platform and rotor-blade effects for HF antennas mounted to helicopters that have tandem main (horizontal) rotor blades, such as the U.S. Army Chinook cargo helicopter (CH–47D).
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Finite-difference time-domain analysis of HF antennas on helicopter airframes
The FDTD method utilizing the recently introduced Berenger PML absorbing boundary condition has been used to analyze the radiation characteristics of HF antennas mounted on a helicopter.
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Cosite interference between wire antennas on helicopter structures and rotor modulation effects: FDTD versus measurements
[4] J. W. R. Cox, “Corroboration of a moment-method calculation of the maximum mutual coupling between two hf antennas mounted on a helicopter,” Proc. Inst.
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Ground effects for VHF/HF antennas on helicopter airframes
Abstract—In this paper, the finite element method (FEM) is used to predict the space and surface wave radiation patterns of VHF/ HF antennas mounted on a helicopter in the presence of a lossy ground.
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New method for modelling and design of multiconductor airborne antennas
1 Cox, J.W.R.: ‘Corroboration of a moment-method calculation of the maximum mutual coupling between two HF antennas mounted on a helicopter’, IEE Proc.
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The use of side-mounted loop antennas on platforms to obtain nearly omnidirectional radiation
One well-known example of this is an HF antenna mounted to aircraft where the goal is to excite a dipole moment along the entire airframe [2].
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Problems concerning the validation of moment-method models of small aircraft in the HF band
The problem of validating proceduresfor performance prediction is acute in the case of HF antennas mounted upon aircraft : partielarly small aircraft Information concerning the performance of proposed antenna systems (as distinct from simply the antenna itself)is usually required at an early …
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Calculation of HF notch antenna terminal impedance for variable geometry aircraft
To calculatethe characteristics throughout the band of HF antennas mounted upon aircraft, the use of a moment-method (or an equivalent) is required.