HT-30 HF Broadband Transportable Dual Input Antenna CP 3-30 MHz
Frequency Range: 3-30 MHz
VSRW: 2:1 max
Polarization: Circular
Pattern: Omnidirectional
Deployed Size: 30′ H
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Description
The HT-30 3 to 30 MHz antenna is used for short and medium range skywave propagation circuits. It is designed to handle 14 kW transmitters. The antenna is designed for field operations where transportability is essential and erection and disassembly must be accomplished in a minimum time by a minimum number of personnel. The equipment is stored in transportable two-man carry containers. The antenna consists of two orthogonal broadband dipole elements supported by a 30 ft. telescoping mast at the center of the structure. The elements slope radially outward and toward the ground. Each element is made of five phosphor-bronze wires in a fan shaped configuration that terminate to a resistive load to ground. The telescopic mast is pneumatically operated and is designed for rapid deployment of tactical antennas. It is a PM-456 mast that is modified to provide a 30 foot erection height for the antenna matching unit (AMU). The AMU consists of four identical RF units that match the fan dipole elements to 50 ohms.
The elements are fed using a broadband quadrature hybrid which enables the antenna to radiate either right-hand circular or left-hand circular polarization. The hybrid locate at ground level near the base of the mast. The hybrid outputs connect to the AMU by means of four RG-393 coaxial transmission lines
Spec Sheet
Spec Sheet
SPECIFICATIONS |
PERFORMANCE |
---|---|
Rain | Mil-Std-810 Method 506.2, Procedure I, 6.6 Inches/Hour |
Lightning | All Housings And Dipole Elements Have A DC Path To ground |
Salt Fog | Mil-Std-810 Method 509.2, Procedure I |
Sand & Dust | Mil-Std-810 Method 510.2, Procedure II |
Disassembly Time | 2 Technicians, 2 Hours |
Operational Temperature Range | -22 Degrees F to 155 Degrees F |
Storage Temperature Range | -40 Degrees F to 160 Degrees F |
Elevation Pattern, Below 8 MHz | Beam Max At The Zenith |
Elevation Pattern, Above 8 MHz | Beam Max No Lower Than 12 Degrees Above The Horizon |
Solar Radiation | Mil-Std-810 Method 505.2, Procedure II |
Communications Range | Short to Medium Range Skywave |
Altitude | Up To 40,000 feet |
Gain, 4-30 MHz, dBi | 0 dBi Minimum |
Radius | 104 feet |
Power Capability | 14 kW Average |
Number of Inputs | 2 |
Installation Time | 2 Technicians 90 Minutes Not Including Anchors |
VSWR | 2:1 Maximum |
Frequency Range | 3 to 30 MHz |
Height | 30 feet |
Gain, 3-4 MHz, dBi | -4 dBi Minimum |
Snow | 40 PSF |
Input Impedance | 50 Ohms |
Weight | 700 lbs |
Wind & Ice | 90 MPH, No Ice |
Fungus | Mil-Std-810 Method 508.3 |
Vibration, Packed | Mil-Std-810 Method 514.3, Procedure II |
Shock, Packed | Mil-Std-810 Method 516.3, Procedure II |
Azimuth Patterns, 16 to 30 MHz | Omni +/- 3 dB |
Azimuth Patterns, 3-15 MHz | Omni +/- 1.5 dB |
Polarization | Right-Hand Circular Or Left-Hand Circular |
Operation Modes | Transmit |
Relative Humidity | Up to 100% |
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