Strona wydrukowana z adresu: http://radmor.com.pl/Civil-products/Accessories/Antennas/Mobile/Mobile-Antenna-30821

Mobile Antenna 30821

Mobile antenna 30821

Mobile antenna 30821

The 30821 rod antenna is designed to work with mpbile radiotelephones operating in frequency bands: 299,5 ÷ 345 MHz or 400 ÷ 470 MHz. This type of antenna is adapted for installation on any motor vehicle.

Electrical specifications:

 

Type (electrical length of antenna)

3/4λ

Code of horizontal antenna radiation pattern

000ND00 (according to CEPT T/R 25-08 Recommendation)

Versions of the antenna as a function of operating frequency

Version

Operating band [MHz]

1, 9

299,5 ÷ 309

2, 10

335,5 ÷ 345

3, 11

420 ÷ 435

4, 12

428 ÷ 442

5, 13

435 ÷ 450

6, 14

440 ÷ 455

7, 15

448 ÷ 462

8, 16

455 ÷ 470

17, 20

400 ÷ 415

18, 21

405 ÷ 420

19, 22

410 ÷ 425

Nominal input impedance

50 Ω

Standing wave ratio (SWR)

<1,6

Antenna's power gain with the respect to the unipole λ/4

4 dB (6,15 dBi)

Polarization type

vertical

Max power

50 W

The antenna is equipped with the following connectors

Version

Connector

1 ÷ 8, 20 ÷ 22

without conncector

9 ÷ 19

TNC-50

Type of antenna cable

RG 58 All (or equivalent) 4m length

Mechanical specifications:

Max height of antenna over the vehicle's body ver.     1, 2, 9, 10
 ver.     3 ÷ 8, 11 ÷ 22

 958 mm
640 ÷ 730 mm
(dep. on the frequency

Radiator weight

0,16 kg

Weight of antenna with coaxial cable

0,36 kg

Antenna mounting hole diameter

Φ 16,2 mm

Environmental conditions:

Operating temperature

-40°C ÷ +60°C

Relative humidity

< 98% in temp. +40°C

Operating conditions:

Antenna needs to be mounted to the metal body of a vehicle or to the metal bracket which is galvanically connected to the bodywork, which is a “ground plane”  for the antenna. The place of mounting of the antenna needs to be close to the center of the largest horizontal plane of vehicle’s metal bodywork or close to the center of the whole structure of a vehicle. This way of installation ensures correct antenna impedance and a horizontal radiation pattern closest to circular.
The hole in a vehicle’s bodywork of a diameter of Φ 16,2 mm is required for installation of the antenna. During the installation it is particularly important to ensure a galvanic contact between the antenna base (shield of a coaxial cable supplying an antenna ) and the bodywork of a vehicle.