Design Of The Antenna And Its Elements; Assembly - Gigahertz Solutions UBB27 Mode D'emploi

Ultrabreitbandantenne UBB27 / Ultrabroadband Antenna UBB27
Design of the antenna
and its elements
© Gigahertz Solutions GmbH, D-90579 Langenzenn
1) HF-Analyser, for illustration, not supplied.
2) Resonator ("large monopole")
3) Indicator lights (LED's)
Red = contact to circuitry and power
supply ok
green = contact of the resonator ok
4) Ground plane for shielding radiation from
sources below, including the instrument
itself.
5) Ferrites for enhancement of the electric
characteristics of the antenna.
6) Casing for the circuitry (incl. Filter and
compensation).
7) Mechanical holding fixture fitted for our
HF-Analysers.
8) Antenna cable with further ferrites.
9) SMA connector to the instrument with
easy-mount screw (not in picture).

Assembly

Insert the holding fixture into the crossed slot
in the front section of the HF-Analyser. Con-
nect the antenna cable to the antenna input
of the HF-Analyser. Try not to bend the cable
too sharply.
Note of caution:
For technical reasons the resonator is a
very delicate part: The slim foot end
should be as slim as possible from a tech-
nical point of view. Avoid touching it, even
though a slight inclination does not influ-
ence to measurement significantly.
Revision 2.0 (09/15)
Technical instructions for the use
of the UBB27
The two LED's indicate functionality of the
antenna with the instrument when the in-
strument is switched on:
The green LED checks the internal circuitry
of the antenna and is on only when it is ok.
At the same time it indicates an adequate
power supply.
The red LED verifies the antenna is correct-
ly connected to the instrument. The red
LED turns on if the connectors and con-
tacts are ok.
Both LED's are part of an analogue circuit.
When the power becomes "low", they do
not go off completely, instead they become
dimmer.
The power for the active circuits of the
UBB27 is supplied by the RF analyser
(HFE35C or HF59B) through the antenna
socket.
The power consumed by the UBB27 alone
is higher than that of the instrument itself.
The time one battery charge can power the
instrument plus antenna therefore is re-
duced to less than half. For long term re-
cordings use the external power supply.
As long as the display does not show "low
batt", the measurements are reliable, re-
gardless of the reduced brightness of the
LED's.
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