How To Choose an Antenna Antenna Cables & adapters to better position your antenna Antenna Mounts Bulkhead Nut washer o-ring RP-SMA Weatherproof antennas LTE Antennas, 4G Antennas, GSM Antennas Dual Band Antennas

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

Tech Support - Antenna Cables

    1.37mm Low-Loss Cable for U.FL Connectors

    1.37mm coaxial cable has similar signal loss as RG174 and RG178, but is thinner and more flexible:  It has same size conductor as RG178 cable, but smaller overall diameter.   It's flexibility helps the U.FL cable connectors stay attached, and makes it more suitable than RG174 or RG178 for the tight space of a small case or enclosure.

    Physical characteristics of 1.37 coaxial cable

    1.37 coaxial cable is a micro coax with diameter of 1.37mm and American Wire gauge of 30. Its structure is typical of coaxial cable with the following components:

    ●Inner conductor made from silver coated copper with a diameter of 0.32mm.

    ●A clear fluorinated ethylene propylene (FEP) dielectric of 0.30mm thickness which provides electrical insulation as well as thermal and chemical resistance.

    ●A single shielding layer of 16/6 braided tinned copper wire with 96.4% coverage.

    ●A resilient opaque FEP jacket of 0.13mm thickness.

    Electrical properties of 1.37 coaxial cable

    1.37 coaxial cable has an impedance of 50 Ohms which is critical for its many applications. Other features of its electrical profile are:

    ●Conductor resistance of 335 Ohms for every kilometer of length.

    ●VSWR of 1.3 between 0 and 6 GHz

    ●Capacitance of 95.8pF/M

    This cable has a minimum bend radius of 9mm, and performs. optimally at temperatures between -50 and 200 degrees Celsius (-58 and 392 degrees Fahrenheit).

    Key applications of 1.37mm coaxial cable

    This cable lends itself to a variety of applications particularly wireless networking as it can handle frequencies up to 6 GHZ. It can be used in set-ups for:






    The small form and flexibility of this coax cable lends itself to ultra-minature assemblies such as those of mini PCIs where it can be used for board to board connectivity. 1.37 works with UMCX connectors such as the Hirose UFL connector.

    Attenuation dB/ft



    2500 =2.6




    Posted by

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

    ATTENUATION dB/ft. 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 [...]

    Read More »

    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 [...]

    Read More »

    U.FL Cables Coax Types Compared: 1.13mm, 1.32mm, 1.37mm, RG174, RG178

    1.13mm coaxial cable is the most commonly-used coax for U.FL cables - especially short cables.  1.13 is the only coax that can be used with MHF4 cables. When connecting U.FL connector to a jack on a miniPCI card or board, sometimes the tight space requires the use of 1.13mm cable, because it is very thin and [...]

    Read More »

    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 [...]

    Read More »

    Double Shielding of Antenna Cables for Low Signal Loss

    Interference and Cable Shielding Shielding protects against both leakage and absorption of stray radiation of electrical noise by cables.Electrical "signal noise" interferes with the operation of antennas and antenna cables. Cables carrying high frequency charge naturally pose the risk of EMI transfer - both from shedding interference as well as accepting it. While insulation protects antenna cables from physical [...]

    Read More »

    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 [...]

    Read More »

    Nickel and Gold-Plated Brass Compared as Platings for Antenna Cable Connectors and Adapters

    Rust Proofing and Corrosion-Protection: Best Options Among Nickel, Gold-Plated Brass & Brass Alloys:For outdoor applications, nickel-plated brass is the best option.Nickel-plated brass one is much durable than gold-plated for weatherproofing of antenna cable connectors.Nickel-plated brass is the most corrosion-resistant option:  Nickel-plating will last at least 5 years. Normally 5-10 years - depends on application field. Data [...]

    Read More »

    RoHS 3 Compliance of Coaxial Antenna Cables , Connectors and Adapters

    All of Data Alliance’s antenna cables and adapters for antenna cables, are compliant with RoHS 3 and REACH.Our antenna cable connectors and adapters' composition is mainly of copper alloys.  The germane RoHS 3 Exemption is rules item 6(c):  Lead as an alloying element in copper containing up to 4% lead by weight.  Regarding other elements, that are [...]

    Read More »

    Operate 2 Antennas from One Radio: Use a "Power Divider" or "Antenna Combiner" - NOT a T-adapter

    Do not use a "T connection" to get one AP to service two antennas: This causes many problems, further described below.  By "T connection," we mean T-adapter (see photo below) to combine two antennas onto the same antenna cable. A "T" is the incorrect way to split to antennas or transmitters. It results in a 2:1 [...]

    Read More »

    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