APC-7 connector

APC-7 connector

The APC-7 connector (for Amphenol Precision Connector) is a precision sexless, 7 mm, coaxial connector that was used on laboratory microwave test equipment up to 18 GHz. The connector is not suitable for modern laboratory equipment that works above 18 GHz, so the connectors are not as common as they were.

The connectors are expensive, so they are seldom used outside the laboratory.

APC-7 connectors are used on microwave test equipment because low-reflection coefficient and repeatable coaxial connections are required. Furthermore, cost is not a central concern for test equipment: accuracy is.

An APC-7 connector pair has several desirable features.

*The connectors are sexless. Sexless connectors avoid some awkward adapters or duplication of laboratory standards. With a sexed connector, a laboratory might need a precision male load and a precision female load. With a sexless connector, only one load is required.

*The connectors have a well defined reference plane. Consequently, the connectors simplify some measurements.

*The mated pair of APC-7 connectors has a low reflection coefficient / low VSWR. The low reflection coefficient means better measurement accuracy. The maximum VSWR is "1.04:1" at 18 GHz.

*The mated pair makes a repeatable connection. A pair has a repeatable reflection coefficent to ±0.001. Consequently, laboratory measurements will be repeatable.


The features of the APC-7 connector come at a price — adapters are required to change from the laboratory world to the connectors that are used on everyday products. These adapters are precision devices and are expensive.

Adapters between APC-7 and other common RF connectors (e.g. N, SMA, TNC) are available from various vendors.

Origin of the name

APC-7 stands for Amphenol Precision Connector – 7 mm. Hewlett-Packard started developing the connector in the mid-1960's. Amphenol improved the design and started manufacturing the connector. [cite book|last=Hewlett-Packard|title=Coaxial & Waveguide Catalog and Microwave Measurement Handbook|year=1979–80|pages=page 90]

Other names

The connector is sometimes referred to a just a 7 mm connector. (Amphenol also developed the smaller APC-3.5 connector that is an improvement on the SMA connector.)

Companies will commonly change the first letter of the acronym to match theirs. So you sometimes see APC-7 from Maury Microwave or Agilent Technologies or RPC-7 from Rosenberger Micro-Coax.

For this reason the acronymn GPC-7 was introduced. This is short for General Precision Connector-7.

LPC-7 (Laboratory Precision Connector-7) refers to inner conductors with only air dielectrics. This means that LPC-7 can only refer to unsupported air lines.

As GPC-7 started to be used for lower grades of the same type, a catch all of PC-7 (Precision Connector-7) is now often used.


External links

* [http://www.rosenberger.de/PDF/Products_TestMeasurement/RPC-7.pdf Rosenberger RPC-7]

Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • APC — or Apc or may refer to:Biology* Antigen presenting cell in medicine/immunology * APC (gene), a human gene that is classified as a tumor suppressor gene * APC (protein), a human cancer critical protein (product of APC (gene)) * Anaphase promoting… …   Wikipedia

  • APC III — The APC III (Advanced Personal Computer) was released by NEC in 1983[citation needed]. The APC III was based upon the Intel 8086 processor, with superior specifications to the IBM PC. Feature APC III IBM PC Speed 8 MHz 4.77 MHz… …   Wikipedia

  • RF connector — Male Type N RF connector. A coaxial RF connector is an electrical connector designed to work at radio frequencies in the multi megahertz range. RF connectors are typically used with coaxial cables and are designed to maintain the shielding that… …   Wikipedia

  • Optical fiber connector — An optical fiber connector terminates the end of an optical fiber, and enables quicker connection and disconnection than splicing. The connectors mechanically couple and align the cores of fibers so that light can pass. Better connectors lose… …   Wikipedia

  • DC connector — A DC connector (or DC plug, for one common type of connector) is an electrical connector for supplying direct current (DC) power. Unlike domestic AC power plugs and sockets, DC connectors are not generally standardized. The dimensions and… …   Wikipedia

  • Modular connector — This article is about modular connectors. For the registered jack (RJ) wiring standard, see registered jack. Left to right, modular connectors: 8P8C plug, 6P6C plug, 6P4C plug, 4P4C plug, 6P6C jack …   Wikipedia

  • RCA connector — A/V redirects here. For other uses, see audio visual. RCA connector RCA Plugs for composite video (yellow) and stereo audio (white and red) Type RF coaxial connect …   Wikipedia

  • N connector — Type N Type N connector (male) Type RF coaxial connector Production history Designer Paul Nei …   Wikipedia

  • QMA and QN connector — QMA connector QMA and QN connectors are quick connect RF connectors that were designed to replace the widely used SMA connector (used in low power transmissions; DC–18 GHz) and Type N (used in medium power transmissions; DC–11 GHz) connectors.… …   Wikipedia

  • Motorola connector — Typical Motorola plug found on consumer auto accessory antenna coaxial cables Type RF coaxial connector General specifications …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”