| Log-Periodic
Antennas |
| The
Aluminum-Titanium material allows the construction of light weight, elastic
Log-Periodic antennas which - at the same time - provide low wind
loads. |
| Log-Periodic
antennas cover a wide frequency range without switching elements
and are fed with just a single coax cable. Gain, bandwidth and
front to back ratio remain constant over the entire frequency
range - in contrary to monoband or trapped yagis. |
| No
traps or other loading techniques will limit
the useful output power to the antenna. |
| We
use a double-boom feeding technique and a new kind of element
to boom mounting. Special cross clamps provide a large contact surface
for excellent RF-performance. The crossing of elements is executed by the
double-boom. |
| The
applied transmitting power is mainly limited by the power capability of
the coax cable. Due to the double-boom the input impedance of the Log-Periodic
antenna can be directly matched to the feed line. Additionally, the double-boom
gives the antenna extreme horizontal and vertical stability. No drillings
weaken the mechanical stability of the boom! |
| |
 |
LP
5 |
5 Element Log-Periodic |
14MHz - 30MHz |
|
LP
6 |
6 Element Log-Periodic |
14MHz - 30MHz |
|
LP
7 |
7 Element Log-Periodic |
14MHz - 30MHz |
|
LP
8 |
8 Element Log-Periodic |
14MHz - 30MHz |
|
LP
10 |
10 Element Log-Periodic |
14MHz - 30MHz |
|
LP
12 |
12 Element Log-Periodic |
14MHz - 30MHz |
|
LP
1030 |
10 Element Log-Periodic |
10MHz - 30MHz,
50-54 MHz |
| |
|
|
|
|
DR
11 |
11 Element Wire
Log-Periodic |
10MHz - 30MHz |
|
DLP
11 |
11 Element Wire
Log-Periodic |
7MHz - 30MHz |
|
DLP
15 |
15 Element Wire
Log-Periodic |
7MHz - 30MHz |
|
DLP
18 |
18 Element Wire
Log-Periodic |
7MHz - 30MHz |
|
DLP
20 |
20 Element Wire
Log-Periodic |
7MHz - 30MHz |
|
DLP
22 |
22 Element Wire
Log-Periodic |
3.5MHz - 30MHz |
|
| |
|
LP 5 |
5
Element Log-Periodic 14MHz - 30MHz |
| The ideal
5-Band Antenna. Fits on every house roof. |
 |
|
|
The LP5
is also used in our  Complete
Antenna System AKS8010. |
| Click
here for a picture of the LP5 at DL6MDS on the German/Austrian
border (103kB). |
| Pictures
of a LP5 assembly at ON4AGP:Picture
1 | Picture 2 | Picture
3 | Picture 4 |
|
|
|
LP 6 |
6
Element Log-Periodic 14MHz - 30MHz |
 |
 |
Very low wind
load: 580N (at 120km/h) |
|
Weight: 19kg
(42lb.) |
|
Power handling:
5kW PEP |
|
No balun necessary |
|
Double-boom (40
/ 40mm) electrically fed - increased gain |
|
Corrosion-free
construction through the use of special stainless steel clamps |
|
Crossing-free
feeding of all elements with a defined impedance |
|
Feeding with
just a single coax cable for all five bands (50 Ohm) |
|
Boom length:
4.75m (15.5ft.) |
|
Longest element:
10.90m (35.7ft.) |
|
Turning radius:
5.80m (18.9ft.) |
|
Gain: 5.5dBd |
|
Front-to-back
ratio: 15-20dB depending on the frequency |
|
VSWR: typically
2:1 and better on the amateur radio bands |
|
| |
|
LP 7 |
7
Element Log-Periodic 14MHz - 30MHz |
 |
|
Very low wind load:
600N (at 120km/h) |
|
Low weight: 14kg
(31lb.) |
|
Power handling:
5kW PEP |
|
No balun necessary |
|
Double-boom (40
/ 18mm) electrically fed - increased gain |
|
Corrosion-free
construction through the use of special stainless steel clamps |
|
Crossing-free feeding
of all elements with a defined impedance |
|
Feeding with just
a single coax cable for all five bands (50 Ohm) |
|
Boom length: 6m
(19.7ft.) |
|
Longest element:
11m (36ft.) |
|
Turning radius:
6.30m (20.7ft.) |
|
Gain: 5.7dBd |
|
Front-to-back ratio:
15-20dB depending on the frequency |
|
VSWR: typically
2:1 and better on the amateur radio bands |
|
| |
|
LP 8 |
8
Element Log-Periodic 14MHz - 30MHz |
 |
|
Wind load: 750N
(at 120km/h) |
|
Weight: 21kg (33lb.)
|
|
Power handling:
5kW PEP |
|
Boom length: 6m
(19.7ft.) |
|
Longest element:
11.60m (38ft.) |
|
Turning radius:
6.80m (22.3ft.) |
|
Gain: 6dBd |
|
Front-to-back ratio:
about 20dB |
|
Boom: double-boom
2 x 40mm |
|
| |
|
LP 10 |
10
Element Log-Periodic 14MHz - 30MHz |
 |
|
Bands: 20m, 17m,
15m, 12m, 10m |
|
Wind load: 950N
(at 120km/h) |
|
Weight: 26kg (58lb.)
|
|
Power handling:
5kW PEP |
|
No balun necessary
|
|
Double boom 40/40mm
electrically fed - increased gain |
|
Corrosion-free
construction through the use of special stainless steel brackets |
|
Crossing-free feeding
of all elements with a defined impedance |
|
Feeding with just
a single coax cable for all five bands (50 Ohm) |
|
Boom length: 9m
(29.5ft.) |
|
Longest element:
11.6m (38ft.) |
|
Turning radius:
7.4m (24.2ft.) |
|
Gain: 7dBd |
|
Front-to-back ratio:
20dB depending from frequency |
|
VSWR: typically
2:1 and better on the amateur bands |
|
| |
|
LP 12 |
12
Element Log-Periodic 14MHz - 30MHz |
 |
|
Bands: 20m, 17m,
15m, 12m, 10m |
|
Wind load: 1200N
(at 120km/h) |
|
Weight: 37kg (82.5lb.) |
|
Power handling:
5kW PEP |
|
No balun necessary |
|
Double boom 40/40mm
electrically fed - increased gain |
|
Corrosion-free
construction through the use of special stainless steel brackets |
|
Crossing-free feeding
of all elements with a defined impedance |
|
Feeding with just
a single coax cable for all five bands (50 Ohm) |
|
Boom length: 12m
(39.3ft.) |
|
Longest element:
11.6m (38ft.) |
|
Turning radius:
8.5m (27.8ft.) |
|
Gain: 8dBd |
|
Front-to-back ratio:
20dB depending from frequency |
|
VSWR: typically
2:1 and better on the amateur bands |
|
| |
|
LP 1030 |
10
Element Log-Periodic 10MHz-30MHz, 50-54MHz |
 |
|
Wind load: |
1470N (at
120km/h) |
|
Weight: |
32kg (71lb.) |
|
Power handling: |
5kW PEP |
|
Boom length: |
9.50m (31.1ft.) |
|
Longest element: |
16.22m (53.2ft.) |
|
Turning radius: |
9.80m (32.1ft.) |
|
Gain: |
7dBd |
|
Front-to-back
ratio: |
20dB |
|
Boom: |
double-boom
2 x 40mm |
|
Insulators: |
fiberglass |
|
|
| See
more Log-Period pictures in our Pictures
Gallery. |
| |
| DR
11 |
11
Element Wire Log-Periodic |
|
|
6
Bands: 10MHz-30MHz
Very Low Turning Radius: 3.75m |
 |
|
|
| |
| DLP
11 |
11
Element Wire Log-Periodic 7MHz - 30MHz |
|
DLP 11L
(Light-weight version) |
|
 |
|
Very low wind load:
330N (at 120km/h) |
|
Low weight: 13kg
(29lb.) DLP 11L: 9kg (20lb.) |
|
Power handling:
5kW PEP |
|
Optically very
inconspicuous appearance through the use of wire elements |
|
No swinging elements
at strong wind |
|
No balun necessary |
|
Double-boom (40
/ 18mm) electrically fed - increased gain |
|
High number of
elements due to wire stringing |
|
No corroding parts
through the use of special stainless steel clamps |
|
Best low angle
radiation through high number of elements |
|
Crossing-free feeding
of all elements with a defined impedance |
|
Feeding with just
a single coax cable for all seven bands (50 Ohm) |
|
Loss-free linear
loading feeding on 10MHz, full-size rotary dipole on 7MHz |
|
Suppression of
strong BC transmitters in the 7-13MHz range because 7 and 10MHz are
designed as skip-frequencies (resonant bands) |
|
Boom length: 6m
(19.7ft.) |
|
Longest element:
10.30m (33.8ft.) |
|
Turning radius:
5.40m (17.7ft.) |
|
Gain: 14-30MHz:
5.3dBd, 7MHz: 1dBd, 10MHz: 1dBd |
|
Front-to-back ratio:
15-20dB from 14-30MHz |
|
VSWR: typically
2:1 and better on the amateur radio bands |
|
| |
|
DLP 15 |
15
Element Wire Log-Periodic 7MHz - 30MHz |
 |
|
|
|
One of our customers,
Mr. Marius Rensen, has described the assembly, setup and his experience
with the DLP15 on this nicely done website: http://www.antennex.com/preview/New/c8titanx.htm.
It also includes a lot of detailed pictures of the assembly.
|
| |
|
DLP 18 |
18
Element Wire Log-Periodic 7MHz - 30MHz |
 |
|
Very low wind load:
600N (at 120km/h) |
|
Low Weight: 24kg
(52.8lb.) |
|
Optically very
inconspicuous appearance through the use of wire elements |
|
No swinging elements
at strong wind |
|
Power handling:
5kW PEP |
|
No balun necessary |
|
Double-boom (60/18mm),
electrically fed = increased gain |
|
High number of
elements due to wire stringing |
|
No corroding parts
through the use of special stainless steel clamps |
|
Best low angle
radiation through high number of elements |
|
Crossing-free feeding
of all elements with a defined impedance |
|
Feeding with just
a single coax cable for all seven bands (50 Ohm) |
|
Loss-free linear
loading feeding on 10MHz, full-size rotary dipole on 7MHz |
|
Suppression of
strong BC transmitters in the 7-13MHz range because 7 and 10MHz are
designed as skip-frequencies (resonant bands) |
|
Boom length: 10m
(32.8ft.) |
|
Longest element:
10.42m (34.1ft.) |
|
Turning radius:
6.1m (20ft.) |
|
Gain: 14-30MHz:
7dBd, 7MHz: 1dBd, 10MHz: 2dBd |
|
Front-to-back ratio:
20-25dB from 14-30MHz |
|
VSWR: typically
2:1 and better on the amateur radio bands |
|
| |
|
DLP 20 |
20
Element Wire Log-Periodic 7MHz - 30MHz |
|
Bands: 40m, 30m,
20m, 17m, 15m, 12m, 10m |
|
Very low wind load:
800N (at 120km/h) |
|
Low Weight: 32kg
(71lb.) |
|
Optically very
inconspicuous appearance through the use of wire elements |
|
No swinging elements
at strong wind |
|
Power handling:
5kW PEP (40m - 10m) |
|
No balun necessary
|
|
Double-boom (60/18mm),
electrically fed = increased gain |
|
High number of
elements due to wire stringing |
|
No corroding parts
through the use of special stainless steel clamps |
|
Best low angle
radiation through high number of elements |
|
Crossing-free feeding
of all elements with a defined impedance |
|
Loss-free linear
loading feeding on 10MHz, full-size rotary dipole on 7MHz |
|
Suppression of
strong BC transmitters in the 7-13MHz range because 7 and 10MHz are
designed as skip-frequencies (resonant bands) |
|
Boom length: 12m
(39.3ft.) |
|
Longest element:
10.42m (34.1ft.) |
|
Turning radius:
6.8m (22.3ft.) |
|
Gain: 14-30MHz:
7.5dBd, 7MHz: 1dBd, 10MHz: 2dBd |
|
Front-to-back ratio:
20-25dB from 14-30MHz |
|
VSWR: typically
2:1 and better on the amateur radio bands |
|
| |
|
DLP 22 |
22
Element Wire Log-Periodic 3.5MHz - 30MHz |
| Rotary
Dipole on 80m: Very high efficiency through the use of TITANEX-High-Q-coil
TC100. Best DX characteristics |
 |
|
Bands: 80m, 40m,
30m, 20m, 17m, 15m, 12m, 10m |
|
Very low wind load:
800N (at 120km/h) |
|
Low Weight: 32kg
(71lb.) |
|
Optically very
inconspicuous appearance through the use of wire elements |
|
No swinging elements
at strong wind |
|
Power handling:
5kW PEP (40m - 10m), 3kW PEP on 80m |
|
No balun necessary
|
|
Double-boom (60/18mm),
electrically fed = increased gain |
|
High number of
elements due to wire stringing |
|
No corroding parts
through the use of special stainless steel clamps |
|
Best low angle
radiation through high number of elements |
|
Crossing-free feeding
of all elements with a defined impedance |
|
Feeding with two
coax cables (one for 80m, one for 40m-10m) |
|
Loss-free linear
loading feeding on 10MHz, full-size rotary dipole on 7MHz, rotary
shortened dipole on 3.5MHz through use of TITANEXHigh-Q-coil
TC100. The rotary dipole for 80 can either be tuned to 80m CW or 80m
SSB. |
|
Suppression of
strong BC transmitters in the 7-13MHz range because 7 and 10MHz are
designed as skip-frequencies (resonant bands) |
|
Boom length: 12m
(39.3ft.) |
|
Longest element:
10.42m (34.1ft.) |
|
Turning radius:
6.8m (22.3ft.) |
|
Gain: 14-30MHz:
7.5dBd, 7MHz: 1dBd, 10MHz: 2dBd, 3.5MHz: 0dBd |
|
Front-to-back ratio:
20-25dB from 14-30MHz |
|
VSWR: typically
2:1 and better on the amateur radio bands |
|
 |
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| Accessories | ULTRATOWER
|
| Last
updated: Nov 5, 2006 |