Overview of LMR400
The LMR-400 from Times Microwave is built for versatility, low loss, RF shielding, and wearability. The cable design of the LMR-400 allows for the tightest bend radius of any cable of comparable size and performance. The cable has the least amount of loss of any similar cable. This cable has 90 dB of RF shielding and is suited for situations with a lot of EMI. The LMR-400 may be used both indoors and out. Use Times Microwave's LMR-400 cable for any application that requires an easily routed, low loss RF wire (e.g. WLL, GPS, LMR, WLAN, WISP, WiMax, SCADA, Mobile Antennas). The LMR-400 is a direct replacement for the RG-8 cable.
Overview of RG58
A flexible RG58 coax cable with the part number RG58C/U is from Pasternack. The RG58 flexible coax cable from Pasternack is 50 Ohm and features a PE dielectric. Our RG58 coax has a PVC jacket with a thickness of 0.195. (NC). The shield count for RG58 coax is one, and the maximum frequency for this Pasternack cable is 5 GHz. At 1 GHz, the RG58 coax cable has a 20 dB attenuation and a maximum power of 44 watts.
Over 40,000 RF, microwave, and millimeter-wave components are made up of Pasternack RG58 coax cables. RG58 cables and other RF components are available for same-day shipping anywhere in the world. We can build and ship custom RF wire assemblies utilizing RG58 or another coax on the same day as well.
Conclusion of LMR400 and RG58’s differences
RG58 has a significantly higher loss due to changes in insulation and electrical characteristics (attenuation). It's perfect for its initial application, which is mostly in cable television, but not for Helium antenna systems, especially over such a long distance. LMR240 is the basic minimum for 15 meters, however, everyone in the community strongly recommends LMR400.
Although LMR400 cable has low loss, it is thicker and less flexible than RG58 or LMR240 cable, making it more difficult to work with. It comes in lengths ranging from 2' to 100' and is designed to be used with antennas and amplifiers that don't come with cabling.
If you want to learn more, try to follow the below link to see the article about RG58 VS LMR400.
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