InnovAntennas OWL Ultra 432 MHz Yagis
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Top Features
- Best gain/length ratio
- Very low side lobes, low noise
- Numerically optimized, extensive simulation
- Very good bandwidth at low impedance
Supply Scope
- InnovAntennas 432 MHz OWL Yagi
- Mast clamp
- Instruction
Technical description
InnovAntennas' "OWL Ultra L" Yagis are extensively numerically simulated and optimized using special software. This includes the correct 3D simulation of the boom, the isolators, the connector and the cable. This is the only way to really achieve the optimum of what is technically possible.
Low impedance Yagi antennas usually offer very good performance (gain, forward/back ratio, etc.), but are very narrow band, plus the SWR minimum shifts slightly in rain. Not so with the OWL Ultra L Yagis from Justin, G0KSC, the owner of InnovAntennas. The very careful and elaborate numerical simulation of the antennas with modern software allows an optimization that was hardly conceivable before. In addition, the practical experience in antenna construction to design a really powerful Yagi.
The boom is made of square aluminum with 25mm edge length. The passive elements are inserted through the boom and isolated. The fed dipole is in the same plane also in the boom. The dipole center is grounded, this removes static charge and protects the transceiver. However, the most important factor in lower noise is the greatly reduced side lobes in the elevation plane. The OWL Ultra Yagis have been optimized to have as few side lobes as possible here, which can easily pick up interference from the ground and from the neighborhood.
Application description
The InnovAntennas OWL Ultra Yagis are suitable for all "Weak Signal Modes" on 70 cm due to the optimization for high gain with very low noise at the same time. So EME, Meteor Scatter, Tropo-DX, Sporadic-E etc. Despite the robust construction (the antennas can withstand wind speeds of up to 160 km/h!), the Yagis are still relatively light and thus suitable for smaller masts or for staking multiple antennas.
The OWL Ultra Yagis are delivered without balun, the coaxial cable is connected directly to the dipole as usual for such antennas. In this case the power limitation is 3 kW. With the recommended balun a maximum power of about 1.0 to 1.5 kW is possible.
The dipole has an impedance of 50 Ohm. The length of the dipole is adjustable, for example for cases where the antenna has to be installed close above the roof surface. Thus, in all cases, a very good SWR is achieved over a wide frequency range. The excellent gain to noise ratio (G/T ratio) makes InnovAntennas OWL Ultra Yagis particularly suitable for antenna systems that are adjustable in elevation: i.e. antenna systems for EME or for satellite operation. But even when used without an elevation rotor, the low noise has a very beneficial effect, weaker signals become much more audible.
| Product Name | InnovAntennas OWL Ultra 432 MHz Yagis |
|---|---|
| Antenna mount | Center Mount |
| Antenna Type | Directional Antenna |
| Design of antenna | Yagi |
| Antenna Guying | No |
| Band | 70cm |
| Boom length [cm] | 430 cm |
| Brand | Innov Antennas |
| Frequency Range | 430 - 435 MHz |
| Front/Back ratio [dB] | 34.3 |
| Gain [dBi] (free space) | 17.9 |
| Max. Power [W] | 3000 W |
| Number of Elements | 18 |
| Polarisation | Horizontal |
| Balun Included | No |
| Boom Size | 25 x 25 mm |
| Strut | no |
| Max. Windspeed (km/h) | 160 |
| Boom length / Gain | 18 El / 430 cm / 23.5 dBi |
| Number of connectors | 1 |
