VHF/UHF/Microwave Notes
Figure 6 Fresnel Zone for a Radio Link
Figure 6 Fresnel Zone for a Radio Link
| Cable Type | 144 MHz | 220 MHz | 450 MHz | 915 MHz | 1.2 GHz | 2.4 GHz | 5.8 GHz |
| RG-58 | 6.2
(20.3) |
7.4
(24.3) |
10.6
(34.8) |
16.5
(54.1) |
21.1
(69.2) |
32.2
(105.6) |
51.6
(169.2) |
| RG-8X | 4.7
(15.4) |
6.0
(19.7) |
8.6
(28.2) |
12.8
(42.0) |
15.9
(52.8) |
23.1
(75.8) |
40.9
(134.2) |
| LMR-240 | 3.0
(9.8) |
3.7
(12.1) |
5.3
(17.4) |
7.6
(24.9) |
9.2
(30.2) |
12.9
(42.3) |
20.4
(66.9) |
| RG-213/214 | 2.8
(9.2) |
3.5
(11.5) |
5.2
(17.1) |
8.0
(26.2) |
10.1
(33.1) |
15.2
(49.9) |
28.6
(93.8) |
| 9913 | 1.6
(5.2) |
1.9
(6.2) |
2.8
(9.2) |
4.2
(13.8) |
5.2
(17.1) |
7.7
(25.3) |
13.8
(45.3) |
| LMR-400 | 1.5
(4.9) |
1.8
(5.9) |
2.7
(8.9) |
3.9
(12.8) |
4.8
(15.7) |
6.8
(22.3) |
10.8
(35.4) |
| 3/8" LDF | 1.3
(4.3) |
1.6
(5.2) |
2.3
(7.5) |
3.4
(11.2) |
4.2
(13.8) |
5.9
(19.4) |
8.1
(26.6) |
| LMR-600 | 0.96
(3.1) |
1.2
(3.9) |
1.7
(5.6) |
2.5
(8.2) |
3.1
(10.2) |
4.4
(14.4) |
7.3
(23.9) |
| 1/2" LDF | 0.85
(2.8) |
1.1
(3.6) |
1.5
(4.9) |
2.2
(7.2) |
2.7
(8.9) |
3.9
(12.8) |
6.6
(21.6) |
| 7/8" LDF | 0.46
(1.5) |
0.56
(2.1) |
0.83
(2.7) |
1.2
(3.9) |
1.5
(4.9) |
2.3
(7.5) |
3.8
(12.5) |
| 1 1/4" LDF | 0.34
(1.1) |
0.42
(1.4) |
0.62
(2.0) |
0.91
(3.0) |
1.1
(3.6) |
1.7
(5.6) |
2.8
(9.2) |
| 1 5/8" LDF | 0.28
(0.92) |
0.35
(1.1) |
0.52
(1.7) |
0.77
(2.5) |
0.96
(3.1) |
1.4
(4.6) |
2.5
(8.2) |
Notes
Attenuation data based on figures from the "Communications Coax Selection Guide" from Times Microwave Systems (http://www.timesmicrowave.com/products/commercial/selectguide/atten/) and other sources.
The LMR series is manufactured by Times Microwave. 9913 is manufactured by Belden Corp. RG-series cables are manufactured by Belden and many others. The LDF series are foam dielectric, solid corrugated outer conductor cables, best known by the brand name HELIAX (®Andrew Corp.).