KYOWA MRS-100 Series, Instruction Manual

Page: 56 / 81

55
3) Align the direction/orientation of the antennas
The transmitting and receiving antennas can be positioned facing certain directions for reliable transmission
and reception. This takes advantage of "radiation characteristics."
In addition, radio waves are sent from the transmitting and receiving antennas with a certain polarization,
which makes it necessary to align their orientations. Doing so takes advantage of "polarization
characteristics."
Considering both of these characteristics when installing the antennas enables the transmitting and receiving
antennas to operate at optimal performance, which in turn can ensure adequate transmission distance and
improve the reliability of wireless communication.

Radiation characteristics

Radiation characteristics of transmitting antennas (Transmitter)
In case of MRS-104A-S In case of MRS-101A-S/V
If the transmitter is positioned as shown in the above figure, the transmitter's built-in transmitting antenna of
MRS-104A-S covers areas horizontally. (Imagine that it provides doughnut-shaped coverage). On the other
hand, the transmitting antenna of the MRS-101A-S/SE/V has high directivity toward the front. (Imagine that it
provides gourd-shaped coverage.)

Radiation characteristics of receiving antennas (Receiver)
In case of high gain dipole antenna
(DA-DB-05RP-SMA-08)
In case of receiving antenna (W1030)
The receiving antenna in the receiver covers areas holizontally when installed upright. (Imagine that it provides
doughnut-shaped coverage.)
Although radio waves spread out in every direction horizontally, they do not spread vertically, relative to the
receiving antenna.
Transmisson antenna
(Built-in antenna) Transmission antenna
(Built-in antenna)
Flont direction