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LMR-195 vs RG58 Cable

The importance of using a low-loss antenna cable is often overlooked. The signal loss in an antenna cable (dB) can cause a huge reduction in efficiency. For every 3 dB lost in the antenna cable, the transmitter power will be reduced to half before reaching the antenna. Many of the antenna cables found on the market are manufactured with RG58 cable. At Infinite Cables, we have standardized on Times Microwave LMR-195 simply because of its low-loss characteristics. Please refer to the dB loss chart below. As you can see, the LMR-195 cable out performs RG58 cable by a significant amount.

LMR-195 dB Loss @ Frequency below
Length 1 GHz 2 GHz 2.4 GHz 4 GHz 5.7 GHz
1.5ft 0.18 dB 0.25 dB 0.28 dB 0.37 dB 0.44 dB
3ft 0.35 dB 0.51 dB 0.56 dB 0.73 dB 0.89 dB
6ft 0.71 dB 1.01 dB 1.12 dB 1.47 dB 1.78 dB
10ft 1.18 dB 1.69 dB 1.86 dB 2.44 dB 2.96 dB
15ft 1.76 dB 2.53 dB 2.79 dB 3.67 dB 4.44 dB
25ft 2.94 dB 4.22 dB 4.65 dB 6.11 dB 7.41 dB
RG58 dB Loss @ Frequency below
Length 1 GHz 2 GHz 2.4 GHz 4 GHz 5.7 GHz
1.5ft 0.23 dB 0.34 dB 0.37 dB 0.50 dB 0.61 dB
3ft 0.46 dB 0.67 dB 0.74 dB 1.00 dB 1.22 dB
6ft 0.92 dB 1.35 dB 1.49 dB 1.99 dB 2.45 dB
10ft 1.53 dB 2.24 dB 2.48 dB 3.32 dB 4.08 dB
15ft 2.30 dB 3.36 dB 3.72 dB 4.98 dB 6.12 dB
25ft 3.83 dB 5.61 dB 6.21 dB 8.30 dB 10.20 dB

LMR-400 vs RG8 Cable
LMR-400 is a drop in replacement for RG8 coaxial cable with the exception that LMR-400 has a lower dB loss than RG8 cable. Please refer to the dB loss chart below. As you can see, the LMR-400 cable out performs RG8 cable by a significant amount.

LMR-400 dB Loss @ Frequency below
Length 1 GHz 2 GHz 2.4 GHz 4 GHz 5.7 GHz
6ft 0.25 dB 0.36 dB 0.40 dB 0.53 dB 0.64 dB
10ft 0.41 dB 0.60 dB 0.66 dB 0.88 dB 1.07 dB
15ft 0.62 dB 0.90 dB 0.99 dB 1.32 dB 1.61 dB
25ft 1.03 dB 1.50 dB 1.65 dB 2.19 dB 2.68 dB
35ft 1.44 dB 2.10 dB 2.32 dB 3.07 dB 3.75 dB
50ft 2.06 dB 2.99 dB 3.31 dB 4.39 dB 5.36 dB
75ft 3.10 dB 4.49 dB 4.96 dB 6.58 dB 8.04 dB
100ft 4.13 dB 5.99 dB 6.61 dB 8.77 dB 10.71 dB
125ft 5.16 dB 7.49 dB 8.27 dB 10.97 dB 13.39 dB
RG8 dB Loss @ Frequency below
Length 1 GHz 2 GHz 2.4 GHz 4 GHz 5.7 GHz
6ft 0.44 dB 0.66 dB 0.74 dB 1.03 dB 1.30 dB
10ft 0.73 dB 1.11 dB 1.24 dB 1.71 dB 2.16 dB
15ft 1.09 dB 1.66 dB 1.86 dB 2.57 dB 3.24 dB
25ft 1.28 dB 2.77 dB 3.10 dB 4.28 dB 5.40 dB
35ft 2.55 dB 3.87 dB 4.33 dB 5.99 dB 7.56 dB
50ft 3.65 dB 5.53 dB 6.19 dB 8.56 dB 10.80 dB
75ft 5.47 dB 8.30 dB 9.29 dB 12.84 dB 16.20 dB
100ft 7.3 dB 11.06 dB 12.38 dB 17.12 dB 21.60 dB
125ft 9.12 dB 13.83 dB 15.48 dB 21.40 dB 27.00 dB

RF Connector Index

BNC Connectors

The BNC connector (Bayonet Mount locking Mechanism) has been used for years in a variety of applications on both video equipment and radio antenna connections. BNC connectors can be used in 75ohm professional video environments as well as 50ohm radio communication environments. RCA connectors are usually substituted for BNC connectors on consumer electronics. The TNC connector seen above is a threaded version of the BNC connector and generally has better performance in microwave frequencies.

BNC Male Connector BNC Female Connector BNC Reverse Polarity Male Connector BNC Reverse Polarity Female Connector BNC Right Angle Male Connector BNC Female Bulkhead Connector

FME Connectors

The FME is a miniature 50Ω RF connector series offering excellent performance from DC to 200 MHz used primarily with RG-58 or equivalent coaxial cables employed in mobile applications and installations. The FME female is designed to allow cables it has been installed on to be snaked through the often tight access holes or spaces of a vehicle to the desired equipment location(s) where an FME male adapter to the required equipment connector series is fitted to the female cable connector.

FME Male Connector FME Female Connector

MCX Connectors

MCX (micro coaxial) connectors are coaxial RF connectors developed in the 1980s. They have the same inner contact and insulator dimensions as the SMB connector but are 30% smaller. They use a snap-on interface and usually have a 50 Ω impedance (some are 75 Ω) . They offer broadband capability from DC to 6 GHz. The contact surfaces are gold-plated. This type of connector is used on the Apple Airport Extreme Base Station's external antenna port and requires an adapter for most antennas. MCX and the smaller MMCX connector are frequently used to connect external antennas to GPS receivers. They are also common on USB DVB-T tuners for computers and laptops, to connect an external antenna to the tuner.

MCX Male Connector MCX Male Right Angle Connector

MMCX Connectors

MMCX (micro-miniature coaxial) connectors are coaxial RF connectors similar to MCX but smaller. They conform to the European CECC 22000 specification. The connectors have a lock-snap mechanism allowing 360-degree rotation and usually have a 50 Ω impedance. They offer broadband capability from DC to 6 GHz. MMCX connectors are most commonly seen on Wi-Fi PCMCIA cards as antenna connectors or as connectors for external GPS antennas on small devices like PDAs or GPS receivers. They are also used by various brands of in-ear monitors to connect the cable to the individual earpieces. This allows for the cables to be replaced or swapped. They were developed in the 1990s.

MMCX Male Connector MMCX Reverse Polarity Male Connector MMCX Right Angle Male Connector MMCX Reverse Polarity Right Angle Male Connector

Mini-UHF connectors

Mini-UHF connectors are miniaturized versions of UHF connectors, designed primarily for use in bag-type mobile phones and similar applications where size is an important consideration. Introduced in the 1970s, Mini-UHF has a 3/8-24 thread size and operates up to 2.5 GHz.

Mini-UHF Male Connector Mini-UHF Female Connector

N-Type Connectors

The N connector is a threaded, weatherproof, medium-size RF connector used to join coaxial cables. It was one of the first connectors capable of carrying microwave-frequency signals, the connector was designed to carry signals at frequencies up to 1 GHz in military applications, but today's common Type N easily handles frequencies up to 11 GHz. The male connector is hand-tightened and has an air gap between the center and outer conductors. The coupling has a 5/8-24 thread.

and comes in 50 and 75 ohm versions. The 50 ohm version is widely used in the infrastructure of land mobile, wireless data, paging and cellular systems. The 75 ohm version is primarily used in the infrastructure of cable television systems. Connecting these two different types of connectors to each other can lead to damage, and/or intermittent operation due to the difference in diameter of the center pin.

Some manufacturers which use N-Type connections on some of their Wireless access point products are:



N-Type Male Connector N-Type Female Connector N-Type Reverse Polarity Male Connector N-Type Reverse Polarity Female Connector N-Type Right Angle Male Connector N-Type Female Bulkhead Connector

QMA Connectors

QMA connectors are quick-connect RF connectors that were designed to replace the widely used SMA (used in low power transmissions; DC–18 GHz) and Type N (used in medium power transmissions; DC–11 GHz) connectors. The connectors have been available since 2003. The connector family was created by the Quick Lock Formula Alliance. QMA connectors are the quick lock version of SMA and N connectors. This design can save much handling time because it allows quick mating and demating without tools. Due to the smaller overall size, it can save the operating space and allows for high density arrangement. To make cable routing easier, it can rotate 360 degrees after installation.

QMA Male Connector QMA Right Angle Male

SMA Connectors

SMA (SubMiniature version A) connectors are semi-precision coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw-type coupling mechanism. The connector has a 50 Ω impedance. SMA is designed for use from DC to 18 GHz, but is most commonly encountered with WiFi antenna systems and USB Software Defined Radio dongles[citation needed]. SMA connectors can be visually confused with the standard household 75-ohm type F coax connector (diameters: Male 7⁄16 inch (11 mm) circular or hex; female 3⁄8 in (9.5 mm) external threads), as there is only about a 2 mm difference overall in the specifications. Type F cannot be mated with SMA; this connection is possible using an adapter.

SMA Male Connector SMA Female Connector SMA Reverse Polarity Male Connector SMA Reverse Polarity Female Connector SMA Right Angle Male Connector SMA Female Bulkhead Connector