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Data Alliance Antennas Signal Loss in Antenna Cables.  LMR-100, LMR-200, LMR-400

Tech Support

    RG58 Compared to LMR-200 & LMR-100 Coax: Shielding & Signal Loss

    Frequency (MHZ) RG58 LMR-200
    100 0.048 0.038
    200 0.073 0.048
    400 0.114 0.068
    500 0.125 0.070
    900 0.195 0.228
    1000 0.213 0.119
    1500 0.245 0.129
    2400 0.354 0.169

    RG58, LMR-100 and LMR-200 all have the following characteristics in common:

    • 50 Ohm impedance
    • A weather-resilient polyethylene (PE) dielectric
    • PVC outer jacket

    Structural comparison of RG58 and LMR-100 (aside from what is mentioned above):

    • LMR-100 is a 50 Ohm coaxial cable which shares structural and material similarities with RG58, but has an overall lower diameter of 2.79mm (0.110 inches). 
    • RG58 and LMR-100 have the following key differences:
      • LMR-100 carries a solid bare copper-covered steel (BCCS) central conductor of 0.46mm 
      • LMR-100 is a double shielded coaxial cable.  The inner shield is made from aluminum tape and the outer shield of braided, tinned copper.

    Structural comparison of RG58 and LMR-200 (aside from what is mentioned in the first paragraph above):

    • LMR-200 is a larger diameter (6.1mm 0.24inches) low loss coaxial cable that has double shielding (meaning less loss of signal along the length of the cable), with braided tinned copper and aluminum tape layers coating the dielectric and inner conductor.
    • LMR-200 possesses a larger conductor of 1.42mm diameter made from bare copper (BC) 

    About RG58

    Electrical characteristics of RG58 The typical impedance is within a 2 Ohm range of 50 Ohm. It operates at frequencies up to 5GHz. The conductor resistance is 38.4 Ohm. The dielectric resistance is 500 Ohm.

    Structure and material composition of RG58 cable

    Like all other coaxial cable, RG58 comprises an inner conducting wire, surrounded by and insulating layer and outer conducting shielding. RG58 coax cable is typically manufactured to the U.S. specifications MIL-C-17F and MIL-C-17G 9.

    • The conductor has a diameter of 0.91mm (0.036 inches) and is made from stranded (7 or 19 strand), tinned copper wire, which has added resistance to oxidation and is readily soldered. Solid conductor variants are also available.
    • The dielectric diameter is 2.95mm (0.116 inches) and is made from solid polyethylene (PE). Polythene is heat stable up to a maximum operating temperature of 80 degrees Celsius (176 degrees Fahrenheit), provides flexibility, fire resistance and resilience against abrasions and weathering.
    • RG58 is shielded with flexible and heat stable tinned copper wire braid with coverage of between 70% and 95% depending on manufacturer.
    • The outer jacket of RG58 cable is made from UV-resistant PVC, which is heat-stable but has limited resistance to acids, alkalis and inorganic solvents.
    • The overall diameter of this cable is 5mm (0.2 inches).

    RG58 is a coaxial cable type for antenna cables, made to strict U.S government specifications. The ‘RG’ pre-fix stands for ‘Radio Frequency Government’ and the number refers to the gauge of the cable.

    RG58 applications This coax cable performs well for a variety of radio frequency communication applications in a low-power setting. Key applications include:

    • Testing and measurement
    • Ham and emergency services radio
    • Marine VHF
    • WLAN antennas

    Comparison of RG58 with LMR-100 and LMR-200

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    RG174 compared to LMR-100 Coax : Shielding and Signal Loss

    RG174 and LMR100 Both are compatible with WiFi, Cellular, and most IoT wireless applications. LMR-100 is double-shielded and suitable for outdoor as well as indoor use.  RG174 has a single shield and is not suitable for long-term outdoor use. ATTENUATION Signal Loss: dB/ft. Signal Loss: dB/ft. Frequency (MHZ) RG174 LMR-100 100 0.088 0.038 200 0.140 0.100 400 0.220 0.146 500 0.159 900 0.300 0.228 1000 0.320 1500 0.301 2400 0.750 0.390 RG174 is a small, flexible, coax for antenna cables, with an American Wire [...]

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    Maximum Input Power Rating of Antennas

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    U.FL Cables Coax Types Compared: 1.13mm, 1.32mm, RG174, RG178

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    LMR-200 cable specifications / characteristics

    LMR-200 "Low loss cable" differs from RG58 and other coax standards by double shielding and less attenuation (signal loss in the cable) than the standard cables (e.g. RG58).  LMR-200 is equivalent or better quality compared to LMR-200 (generally better because LMR-200 is double-shielded).Rated for outdoor use and are also suitable for indoor use. very flexible/easily bendable coaxThe [...]

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    Double Shielding of Antenna Cables for Low Signal Loss

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    LMR-100 Coax for Antenna Cables: Shielding & Structure

    LMR-100 is a low loss, double-shielded coaxial cable type that is Data Alliance's standard for short versions of antenna cables with all of the following connector types:  RP-SMA, SMA, N-type connector, RP-TNC, MMCX, 50 Ohm BNC connectors, and FME. LMR 100's range of frequency band compatibility (from 0 to 18GHz) and 50 Ohms impedance matching, makes it suitable and compliant for all the following applications:All WiFi [...]

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    Antenna Beamwidth

    Beamwidth is the angle from which the majority of the antenna’s power, as illustrated on the radiation pattern's main lobe, radiates. It may be measured in the horizontal or vertical planes and is the distance between two points where the power is less than half of the maximum.Beamwidth varies with the physical and electronic characteristics of [...]

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    Antenna Polarization: Vertical, Linear: Key Factor in Selection of an Antenna

    Polarity is a key electrical characteristic to be considered when selecting an antenna. Like-matched antennas in an RF set-up will have optimal power or signal transfer in point-to-point applications.  Polarity is as important as gain, radiation pattern and VSWR. In transmitting antennas, the polarization of an antenna is the direction of the electromagnetic fields produced by the antenna as energy radiates [...]

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    FPV (First Person View) Antennas for Drones

    FPV (First Person View), are remotely controlled vehicles from a pilot’s or drivers point of view. They include unmanned aerial vehicles such as drones and ground vehicles such as RC cars and land moving equipment. FPV video feed and control signals are transmitted across various frequency bands depending on desired range and application. Most FPV [...]

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    Antennas by connector type Frequency Bands of WiFi, Bluetooth, 5G, 4G, 3G, LTE, GSM, ISM, CDMA

    RP-SMA cables and adapters SMA antenna cables and adapters N-type cables and adapters U.FL cables MHF4 Cables MMCX cables
    Dimensions / Measurements of RP-SMA connectors Signal-loss (attenuation) in LMR-100 and LMR-200 cables RP-SMA antenna BNC cables RP-TNC cables and adapters Roof Mounts for Antennas
    LTE Antennas, GSM Antennas, 4G Antennas Through-hole antenna mounts Adhesive Mount Antennas Tripod Antenna Mounts Top Tips for Long Range WiFi