70cm CROSS Antenna 70cm16CROSS 8+8 Element

Rear Mount 70cm CROSS Antenna 70cm16CROSS with 16 elements (8+8) is used as part of the LEO Pack. The advantage of the rear mount is reflected in the fact that is possible to put an antenna on any metal mast. No need to put on fiberglass.

70cm CROSS Antenna 70cm16CROSS for LEO Satellites is designed to cover 70cm band 432 – 440 MHz and any radio modes like CW, SSB, FM, Q65, FT8, and all kinds of communications like DX-ing, Contesting, FM work, and LEO satellite. By order can be added Universal RHCP Kit

 

70cm CROSS Antenna 70cm16CROSS 8 + 8 elements for LEO Satellites

 

What does 70cm16CROSS mean?

• 70cm – 70cm band 432-440MHz
• 16 – 16 elements, 8 elements of horizontal polarization, and 8 elements of vertical polarization
• CROSS – CROSS Yagi antenna has horizontal and vertical elements – separated on a single boom, the antenna is mounted in a “+” format.

 

This 70cm CROSS Antenna 70cm16CROSS is used as part of LEO Kit-Pack 2m and 70cm CROSS RHCP Yagi for Satellites  with added RHCP Kit

 

Electrical Specifications of 70cm CROSS Antenna 70cm16CROSS for LEO Satellites

Frequency Range: 432 – 440 MHz
Free Space Forward Gain: 13.3 dBi
Front-to-Back Ratio: 30 dB
-3 dB Horizontal Beamwidth: 39.6°
Polarization: Horizontal and Vertical. RHCP and LHCP with phase shift
Distance Between Dipoles: 173mm
Degrees: 90°
Isolation Between Antennas: More than 28dB
Nominal Input Impedance: 50 Ohms
SWR Across Entire Band: < 1.2
Maximum Power Input: 2 x 850W
Matching Method: Direct feed through common mode choke (current balun)
Connectors: 2 x “N”

 

What about Orthogonality and related to that isolation between antennas (coupling) say SM5BSZ

“The NEC simulations above show that an isolation of 20 dB is sufficient. This means that the obvious way of checking a cross Yagi is to connect one of the feed lines to a transmitter with known output, and a power meter and a dummy load to the other. The attenuation is then measured directly through the power arriving at the dummy load. If it is below -20 dB compared to the transmitted power everything is fine. ”

Excellent results of isolation achieved -28 dB. Much better than SM5BSZ suggested:

 

70cm CROSS Antenna 70cm16CROSS Azimuth Radiation Pattern

 

Mechanical Specifications of 70cm CROSS Antenna 70cm16CROSS for LEO Satellites

Number of Elements: 16 (8 + 8)
Element Diameter: 4 mm Aluminum rod
Dipole Diameter: 8 mm Hard Copper tube plastic coated
Longest Element: 340 mm
Element Mounting Position: CROSS antenna – 2 Sides
Balun and Connectors: Included
Boom Length: 1.7 m
Single Antenna Length: 1.25 m
Boom Size: Tapered Boom 30×30 mm, 20×20 mm
Turning Radius: 1.8 m
Number of Boom Pieces: 2
Guy rope support: No, strong boom
Mounting Mast Diameter: 43 – 70 mm 1-11/16″ – 2-3/4″ OD
Clamp: 2 x M8 Stainless Steel
Survival Wind Speed: 180 km/h
Net Weight: 2.3 kg
Transportation Length: 1.19 m

 

70cm CROSS Antenna 70cm16CROSS Mounting RHCP Kit and Dipoles View

 

Antennas-Amplifiers Product Benefits. A Major advance in Amateur Radio antenna design.

 

• F/B and G/T superiority.

All antennas have been calculated using state-of-the-art full 3D Electromagnetic Simulation Software including the influence of the boom, bracket, baluns, and connectors. The performance of antennas designed using these techniques is exceptional, far better than antennas designed using “wire” programs.
Comparison of EM simulation software

• No tuning antennas
  

Before dispatch, we assemble each antenna and test antenna characteristics. That means you may expect excellent electrical and mechanical attributes including low SWR across the designed range immediately after assembling.
No need to tune the dipole, or any other element to get perfect SWR on the intended frequency range. Everything is pre-tuned.

• Easy to set up

Everything is labeled, just put number to number. The antenna can be assembled with hand tools in a couple of minutes.
Everything is included in the antenna box: Antenna, balun with connector, and bracket. Yours is to assemble and have fun!

 

Twin Sister 2m antenna with the same 1.7m boom used in LEO Kit-Pack 2m and 70cm CROSS RHCP Yagi for Satellites

Check all 70cm antennas: 70cm antennas

Or LEO Satellites Complete Packs