＃Voltage Standing Wave
Ratio (VSWR)
The lower
return loss of radiating and received signal, the higher
the efficiency of antenna. Yaxin base station antennas
possess of excellent VSWR because of our advanced design,
ensuring the balance of efficiency in radiating and receiving
direction , and reducing the fall call due to the unbalance
in up and down link .
＃Accurate
beam width of horizontal pattern
Yaxin
base station antennas possess of accurate horizontal
beam width. Yaxin antennas can control horizontal beam
width accurately which can not only reduce the blind
areas of coverage but also avoid excessive overlapping
in adjacent sectors.
＃Wider beam width of
vertical pattern
The gain
of antenna is mainly determined by the horizontal beam
width and vertical beam width of pattern. Vertical beam
width depends on the number of the filled zero which
can improve the covering range beside base station.
Comparing to other base station antennas, our vertical
beam width is broader with the same gain, it is quite
profitable to improve the covering range and space.
＃Good suppression of
the first upper sidelobe
The first
upper sidelobe of directional antennas may lead to over
cell interference and affect the normal operation of
the system. Yaxin designers take it into full account
and improve the design for suppressing the first upper
sidelobe to decrease the adjacent sector interference.
＃Good filled-zero characteristic
for lower sidelobe.
The first
zero appears in low side of Yaxin antenna pattern is
shallow and it can improve the characteristic of filled-zero
and the coverage near the base station, and avoid light
shadow effect.
＃High F/B
Using
the antennas with high front to back ratio can reduce
cellular repeat utiliting, enlarge capacity of system,
reduce the hand-over interference caused by the back
radiation. Yaxin directional antennas possess quit high
F/B ration add it is favorable for higher density GSM
mobile telecommunication network.
＃Lower 3rd intermodulation
products
Intermodulation
products will cause too much telephone noise, so we
adjust our design and make it low to guarantee the quality
of communication.
＃Polarization diversity
of antennas
As signals
radiating from different path reach the base station,
there will be the appearance of random and changeable
polarization. Yaxin base station antenna elements possess
+45°/-45° polarization,
and feed the signals to the diversity combiner. It can
improve average signals.
＃Electrical downtilt
There are
many types of Yaxin omni and directional electrical
downtilt antennas. They are used to solve the signal
covering problem in mountainous and hilly areas.
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