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RF Connectors Naming Method

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The naming method of RF connectors is introduced. The main name code of general RF connectors adopts the main name code commonly used at home and abroad. The main name code of the special product is specified by the detailed specification, and how to use the symbol in the specification.

RF connector is referred to as: RF connector, which is usually regarded as a component attached to a cable or installed on an instrument, as a component for electrical connection or separation of transmission lines. It belongs to mechatronics products. Simply speaking, it mainly acts as a bridge.

1.The naming method of RF connectors

The model of the universal RF connector consists of two parts: the main name code and the structural form code, separated by a dash “-” in the middle. Other conditions that need to be explained can be specified in the detailed specification and separated from the structure code by a dash.

2.RF Connector Code Description

1. Introduction of 17 shape codes

Type N: threaded RF coaxial connector with an outer conductor inner diameter of 7mm (0.276 inches) and a characteristic impedance of 50Ω (75Ω). (IEC169-16)

BNC type: Bayonet locking RF coaxial connector with outer conductor inner diameter of 6.5mm (0.256 inches) and characteristic impedance of 50Ω. (IEC169-8)

TNC type: threaded RF coaxial connector with an outer conductor inner diameter of 6.5mm (0.256 inches) and a characteristic impedance of 50Ω. (IEC169-17)

SMA type: threaded RF coaxial connector with an outer conductor inner diameter of 4.13mm (0.163 inches) and a characteristic impedance of 50Ω. (IEC169-15)

SMB type: push-lock RF coaxial connector with outer conductor inner diameter of 3mm (0.12 inches) and characteristic impedance of 50Ω. (IEC169-10)

SMC type: threaded RF coaxial connector with an outer conductor inner diameter of 3mm (0.12 inches) and a characteristic impedance of 50Ω. (IEC169-9)

SSMA type: threaded RF coaxial connector with an outer conductor inner diameter of 2.79mm (0.11 inches) and a characteristic impedance of 50Ω. (IEC169-18)

SSMB type: push-lock RF coaxial connector with an outer conductor inner diameter of 2.08mm (0.082 inches) and a characteristic impedance of 50Ω. (IEC169-19)

SSMC type: threaded RF coaxial connector with an outer conductor inner diameter of 2.08mm (0.082 inches) and a characteristic impedance of 50Ω. (IEC169-20)

SC type (SC-A and SC-B type): The outer conductor inner diameter is 9.5mm (0.374 inches) and the characteristic impedance is 50Ω threaded (two types have different types of connection threads) RF coaxial connector. (IEC169-21)

Type APC7: A precision medium-sized RF coaxial connector with an outer conductor inner diameter of 7mm (0.276 inches) and a characteristic impedance of 50Ω. (IEC457-2)

APC3.5 type: threaded RF coaxial connector with outer conductor inner diameter of 3.5mm (0.138 inches) and characteristic impedance of 50Ω. (IEC169-23)

Type K: threaded RF coaxial connector with an outer conductor inner diameter of 2.92mm (0.115 inches) and a characteristic impedance of 50Ω.

OS-50 type: threaded RF coaxial connector with an outer conductor inner diameter of 2.4mm (0.095 inches) and a characteristic impedance of 50Ω.

Type F: Threaded RF coaxial connector used in cable distribution systems with a characteristic impedance of 75Ω. (IEC169-24)

Type E: Threaded RF coaxial connector used in cable distribution systems with a characteristic impedance of 75Ω. (IEC169-27)

Type L: Metric threaded RF coaxial connector, the size of the threaded connection is indicated by Arabic numerals after “L”.

2. The structural code of the general RF connector consists of the parts shown in the following table:

Standard
Order
  Classification   characteristics code name                  content
  plug receptacle
panel cable
1 Plugs and sockets Plug: T
Socket: Z
(T) (With)
2 Characteristic impedance 50Ω scale 50 or no standard, 75Ω scale 75 50 or 75
3 Contact form Pin: J
Jack: K
J(K) K(J) K(J)
4 Shell form Straight: Unspecified
Bending: W
In In In
5 Installation form Flange: F
nut: Y
welding: H
F or Y or H F or Y or H F or Y or H
6 Type of wiring Cable: Cable Code Microstrip
: D
High Frequency Band: Not Standard
Cable codename D Cable codename
 

Note: ① For the series of plugs with pins and sockets with jacks, the plug and socket codes (No. 1 in the table) in the structural code are not marked. For socket-mounted pin series, use the code in parentheses. ②Those marked with # are only used for panel plugs.

3. Example of model composition of RF connectors:

(1) SMA-JW5, TNC-JW5 Indicates SMA type and TNC type angled non-sealed RF plugs, the inner conductor of the plug is a pin contact, and the SYV-50-3 cable is used.

(2) N-50KFD, SMA-KFD Indicates flange mounted, 50Ω impedance N and SMA microstrip RF sockets with inner conductors as jack contacts.

(3) SMA-KE, 75KHD Indicates that the SMA microstrip jack with an impedance of 50Ω directly soldered on the circuit board is connected to the connector and the SMB jack connector with an impedance of 75Ω.

(4) The model composition method of the adapter and the impedance converter is derived based on the plug or socket model, generally in the following forms:

①The model of the adapter, its type code part is represented by the main name code of the connector (in-series adapter) and the fractional form (inter-series transfer receiver).

Such as: N-75JK Indicates that one end is a pin contact, the other end is a jack contact, and the impedance is 75Ω. N-type series internal adapter.

Such as: N/BNC-50JK Indicates an inter-series adapter with an N-type pin contact at one end and a BNC-type jack contact at the other end with an impedance of 50Ω.

②The model of the impedance converter, its model or structural form code is expressed in fractional form:

Such as: N-50J/75K Indicates that one end is a 50Ω plug, the other end is a 75Ω socket, and both ends are “N” type impedance converters.

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