This is a very small multi-band antenna that fits the need of Hams for an antenna that may fit into attic spaces, etc.
yet perform surprisingly well for its 20" length.
Due to the COMPACtenna patented design which includes magnetic-field-enhancement, this antenna achieves uncommonly good results for its extremely short height
and includes the HAM Radio 20 Meters Band as well a 2 Meters, & 440 operation.
The new COMPACtenna 20M/2M/440 Meets the NEED for High Performance in Limited Spaces and works well with a small Ground Plane/Counterpoise.
By using a small flat metal sheet or mesh which is only about 3’ X 3’ that the antenna is mounted to, good (V)SWR and performance result with the COMPACtenna Model 20M/2M/440.
[Note: For standard type technology antennas, this small size ground plane would typically be quite inadequate for the
20 Meter band, potentially resulting not only in poor (V)SWR but also RF on the outside of the coaxial shield coming back down toward the
radio. This is undesirable for a number of reasons including unpredictable signal patterns with the outside of the shield of the coax acting as a poor counterpoise radiator, as well as noise, and transceiver/amplifier possible concerns.]
Unique Magnetic Field Resonator (Less Receiver Noise), Electric/Magnetic Field Diversity Science & Technology Design
[Duty Cycle at max. power rating: Maximum total transmit time of 1 minute in any 3 minute period.
Superior Science Performance in NLOS (Non-Line-Of-Sight) Obstructed Environments such as due to buildings, hills, in valley location, indoor installation.
This provides for a Unique Low Cost Easy Installation Base Station Antenna in an attic as well as a variety of limited-space locations.
Power Rating: 100 Watts HF, 85 Watts 2M; 50 Watts 440
Hotter conditions such as higher ambient temperature, sun exposure, lesser air flow, etc. decrease duty cycle.]
[Due to its Unique Science, Performance is greater than predicted based on gain alone in NLOS (Non-Line-Of-Sight)
environments which is the world we live in .]
(V)SWR: Nominal < 2:1 14.15 - 14.35 MHz (20 Meter Band); 144-148 MHz (2 Meter Band); 420-450 MHz (440 Band)
Each Antenna quality tested.
[Design and specifications subject to change without notice.]