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ANTENNAS FOR VHF / UHF BANDS
| Maximum Gain Antennas As over 70,000 IsoPole owners around the world will attest, the AEA IsoPoles offer the broadest frequency coverage of any comparable VHF base station antennas, as well as providing unmatched performance in the VHF/UHF bands. The IsoPole is available in 150, 220, or 450 MHz versions, each yielding the maximum gain attainable for their respective lengths, as well as providing zero-degree angles of radiation. Innovative Design The IsoPoles are gain-type omni-directional vertical antennas that offer excellent decoupling and are capable of accepting low to very high power levels. They are impedance matched at the factory for complete coverage of their respective bands. The IsoPoles also offer weather-protected input coaxial connectors and matching sections at an attractively low price. The mechanical advantages, combined with certain electrical properties of their non-cylindrical sleeves, have led AEA to seek patent protection for the IsoPole’s unique design. Superior Decoupling The IsoPoles are designed so that the mounting structure and coax do not inadvertently assimilate into the structure of the antenna. This precaution is called decoupling. Many antennas on the market today fail to decouple, causing the radiation pattern of the antennas to become as ineffective as a dummy load. The IsoPole’s superior decoupling results in simple tuning and a significant reduction in RFI potential. There is less feedline pick-up of noise and computer “birdies?with the IsoPole than with any similar antenna on the market. |
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Greater Efficiency The IsoPole’s unique cone design is much more efficient than standard antenna models that offer radials in the horizontal plane. Additionally, the IsoPole offers broad frequency coverage without loss of power output from one channel to another over its broad frequency range. (See specifications below.) VHF versions include a 50 ohm SO-239 connector recessed within a base sleeve for full weather protection. Maximum Power The impedance matching network is designed for low to very high power. It compensates for the impedance bump introduced by the SO-239 connector used in VHF models. Simple Installation The IsoPole is designed to mount on a standard 1.25 inch TV mast (not supplied). All IsoPole antennas are impedance matched in the factory and do not require field tuning. Instead of the typical 25-40 screws of comparable models, the IsoPole requires no more than 5 stainless steel screws to fasten the unit, thereby significantly decreasing assembly time and reducing the opportunity for errors to occur when constructing the antennas. This simple assembly allows even entry level installers to successfully install the IsoPole in a minimum amount of time. Withstands Harsh Conditions The insulating material provides durability, excellent dielectric properties, and long-term ultraviolet resistance. The mounting hardware is constructed of stainless steel, while the decoupling cone and radiating elements are formed from corrosion-resistant aluminum alloys. Due to this rugged construction, the IsoPole will withstand years of exposure to the elements. |
Specifications for the IsoPoles |
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| Model* | Iso-150 | Iso-220 | Iso-450 |
| Frequency coverage | 148-174 MHz | 210-230 MHz | 415-465 MHz |
| Impedence | 50 ohms | 50 ohms | 50 ohms |
| Nominal power rating | 1.0 KW | 1.0 KW | 1.0 KW |
| 2:1 VSWR bandwidth | 10 MHz @ 150 MHz | 15 MHz @ 220 MHz | 22 MHz @ 435 MHz |
| Length | 125.5 in. ( 3.2 m ) | 79.25 in. ( 2 m ) | 46 in. ( 1.2 m ) |
| Minimum mast length** | 8 ft. ( 2.4 m ) | 5.25 ft. ( 1.6 m ) | 6 in. ( 15 cm ) |
| Coax connector | SO-239 | SO-239 | Type N |
| Gain ( on horizon ) | 3 dBd | 3 dBd | 3 dBd |
| * Aircraft band and amateur
versions also available. ** Mast not included. |
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HIGH
PERFORMANCE ANTENNAS
| Outperforms 5/8 Wave Antennas AEA’s Hot Rod antennas are end-fed, half-wave dipoles which are shorter, lighter, and easier to use on handheld radios than 5/8 Wave antennas. They provide approximately 10 dB more gain than the popular “rubber duck?helical, quarter-wave antennas. The Hot Rods are also capable of managing over 25 watts of power, making them ideal portable base or mobile antennas. When collapsed, the Hot Rod antennas function electrically, like helical, quarter-wave, flexible antennas, and perform similarly to the “rubber duck?antennas. AEA offers two different commercial Hot Rod Models: HR-2 Hot Rod Half-Wave 220 MHz and the HR-3 Hot Rod Half-Wave 150 MHz. |
Unique Technology Why do other manufacturers market 5/8 wave instead of half-wave, handheld antennas? Because the matching network required for the mostly resistive 50 ohm feedpoint impedance of the 5/8 wave is much easier to manufacture than the matching network required for the 1000-1500 ohm feedpoint impedance of the half-wave antennas. AEA has solved this matching problem in the half-wave antenna, and at the same time has kept manufacturing costs low. This allows AEA to offer our customers high performance, affordable antennas for handheld units. |
