InnovAntennas

InnovAntennas is a british manufacturer of yagi antennas, who has the goal to supply perfectly optimised antennas for amateur and commercial radio. G0KSC uses the latest methods in software to simulate and design high performance antennas. The manufacturing process is targeted to have a high quality standard, not the cheapest production method possible.

6 x 7EL @W7EW

Each antenna is often available in several variants, which are optimised to the real needs of radio amateurs. Especially when targeting design goals like low weight, high resilience against strong winds, easy portable use and long durability, one design concept is not sufficient, but must be adopted to the individual requirements of the customer.

The yagi antennas by InnovAntennas are not simulated to show highest gain on paper, but target special use cases. For example it is ok for a shortwave beam to optimize it for high gain at large bandwidth, but lower F/B ratio. On VHF/UHF on the other hand, this can lead to worse reception results due to high ground noise picked up by the sidelobes. Here (on VHF/UHF) another design goal is often more important, for example low noise figures (sky temperature, G/T ratio), although at the price of slightly lower gain.

All antennas by InnovAntennas have a dipole which has an impedance of 50 Ω. There is no need for lossy transformers or baluns, the coaxial cable is connected directly to the dipole.

InnovAntennas - Antenna Designs

2m/144MHz LFA Yagi InnovAntennas

144 MHz

The LFA yagi has a rectangular dipole with 1 λ length. The dipole is installed flat on the boom, in the same height as the parasitic elements. The outer sides of the dipole are parallel to the boom and are designed so that they are exactly out of phase by 180°. This cancels the signals on each side, leading to greatly reduced side lobes, low G/T figures and a good front/Back ratio.

2m/144MHz LFA Plus2 Yagi InnovAntennas

144 MHz

LFA Plus2

The 144MHZ LFA Plus2 Yagi is a variant of the LFA design, which has a low SWR curve and a narrow beamwidth. This is achieved by using two additional reflectors behind the main reflector.

4m Yagi InnovAntennas

70 MHz

The Yagis for the 70MHz band are available in different variants:

• LFA: Loop Fed Array, flat dipole on the boom, low noise figure
• LFA Plus2: like LFA, but with two additional reflectors
• OWL/OWA: Optimised Wideband, Low noise. A combination of low weight and good electrical parameters
• LFA-ZTR: Slightly shorter 6-elem., optimised for low sidelobes, slightly lower gain.

6m Yagi InnovAntennas

50 MHz

6x 50MHz 7el @W7EW

The Yagis for the 50MHz band are available in different variants:

• LFA: Loop Fed Array, flat dipole on the boom, low noise figure
• LFA Plus2: like LFA, but with two additional reflectors
• OWL/OWA: Optimised Wideband, Low noise. A combination of low weight and good electrical parameters
• LFA-S: Shortened 4-elem., optimised for low side lobes, good for urban environments
• LFA-LN: Same length as LFA designs, but optimised for low sidelobes, good for urban environments
• LFA-HG: With given boomlength optimised for best gain, at the slight risk of higher SWR at humid weather (rain, fog)
• LFA-VR: Slightly longer than LFA designs, better F/B ratio, resultign in fewer sidelobes and less noise
• LFA-WOS/KW/HZE: Greater boomlength, excellent sidelobe suppression, perfect for urban environments

70cm Yagi InnovAntennas

432 MHz

70cm LFA

The Yagis for the 432MHz band are available in different variants:

• LFA-LN: Loop Fed Array, Low Noise, optimised for good gain at a given boomlength, good suppression of sidelobes
• LFA-SQ: Loop Fed Array, Super Quiet, optimised for lowest noise, at slightly less gain

10m Yagi InnovAntennas

3 El. OWL Design

28 MHz

The Yagis for the 28MHz band are available in different variants:

• LFA: Loop Fed Array, flat dipole on the boom, low noise figure
• OP-DES: Opposing Phase Driven Element System, folded dipole for large bandwidth at a good gain
• OWL/OWA: Optimised Wideband, Low noise. A combination of low weight and good electrical parameters

11m Yagi InnovAntennas

5 El. LFA 6m, 2 El. 10m

27 MHz

The Yagis for the 27MHz band are available in different variants:

• LFA: Loop Fed Array, flat dipole on the boom, low noise figure
• OP-DES: Opposing Phase Driven Element System, folded dipole for large bandwidth at a good gain

12m Yagi InnovAntennas

24 MHz

The Yagis for the 24MHz band are available in a classic yagi design or as LFA:

• LFA: Loop Fed Array, flat dipole on the boom, low noise figure

15m Yagi InnovAntennas

21 MHz

Die 21MHz Yagis stehen in klassischem Yagi-Design oder als 'OP-DES' Variante zur Verfügung:

• OP-DES: Opposing Phase Driven Element System, gefalteter Dipol für bessere Bandbreite bei gutem Gewinn

The Yagis for the 21MHz band are available in a classig yagi design or as OP-DES:

• OP-DES: Opposing Phase Driven Element System, folded dipole for large bandwidth at a good gain

17m Yagi InnovAntennas

18 MHz

The Yagis for the 18MHz band are available in different variants:

• LFA: Loop Fed Array, flat dipole on the boom, low noise figure
• OP-DES: Opposing Phase Driven Element System, folded dipole for large bandwidth at a good gain

20m Yagi InnovAntennas

14 MHz

The Yagis for the 14MHz band are available in different variants:

• LFA: Loop Fed Array, flat dipole on the boom, low noise figure
• OP-DES: Opposing Phase Driven Element System, folded dipole for large bandwidth at a good gain
• OWL/OWA: Optimised Wideband, Low noise. A combination of low weight and good electrical parameters
• HD: Heavy Duty, extra rebust cosntruction for high wind loads

30m Yagi InnovAntennas

10 MHz

Classic for 30m/10MHz.

A customer writes:

From: Matteo
Sent: 23 October 2011 19:29
To: sales@innovantennas.com
Subject: R: R: InnovAntennas Limited - Product enquiry for Product
         Name: 8 element 50MHz LFA2 Yagi (11.67m)


Hello Justin,

new 4x8 LFA array is up and running!

Today I made the first EME QSO and I must admit that performances
are astonishing!

I got a lot of very loud echoes when Moon was elevated above horizon
then, when the Moon was around 5° of elevation, I started to hear very
huge echoes with strongest around -7db measured with WSJT and Spectran.
Ground gain is a good boost!

I kept to get strong echoes even when Moon was already below the horizon
so, when the natural satellite was around -1°, I started to call K2ZD
who was calling CQ.

We completed easily and I received RRR from Mario with my Moon at -2.6°
below horizon! I couldn’t believe that!

The antenna temperature is really very low and I measured it about 4db
better than my previous 4x7 array.

The F/B also is superb, around 30db with very clean pattern and low side
lobes.

I enclose to this email some pictures of the array.

I’ll keep you informed about the tests I’ll run during next days.

Very ’73 de


IW5DHN Matteo