Broadband, omnidirectional antennas are highly sought for their ability to cover a wide range of frequencies. However, designing a broadband, omnidirectional antenna is not a trivial task.
Several design challenges must be addressed. For example, a typical broadband antenna may not have an omnidirectional pattern at all of its frequencies, being particularly more directional at the upper and/or lower frequency ends. Additionally, as the frequency approaches the lower ranges, the required dimensions of a broadband antenna become increasingly large, resulting in an antenna that is too big for its intended application.
This invention is a compact, omnidirectional bicone antenna designed to provide better lower band responses and symmetric patterns while maintaining a low profile. The antenna has the ability to perform better than larger antennas with a smaller footprint.
The height of the antenna is 12.6 inches and the diameter is 8.34 inches. The demonstrated antenna can operate within 225 MHz to 1.85 GHz band range with a voltage standing wave ratio of 2:1.
In contrast, an equivalently performing bicone antenna scaled-up would have an overall height of 16.00 inches and a diameter of 10.6 inches.
The antenna can be modified to operate in other frequency ranges. Potential applications for this technology include cell towers, mini cell towers, telecom, remote control and Wi-Fi in marine, aviation, and military environments.
- Smaller physical footprint, omnidirectional, broadband, low voltage standing wave ratio
- US Patent 8,654,025 available for license
- Potential for collaboration with Navy researchers