| 词条 | APC-7 connector |
| 释义 |
|name = APC-7 |type = RF coaxial connector |image = |logo = |caption = Recessed threads (left), Protruding threads (right) |designer = |design_date = |manufacturer = Originally Amphenol, then Hewlett-Packard, then others |diameter = {{convert|7|mm|in|abbr=on}} |width = |height = |electrical = |earth = |maximum_voltage = |maximum_current = |cable = |passband = 0-18 GHz |physical_connector = }} The APC-7 connector (also referred to as a 7 mm connector) is a precision coaxial connector used on laboratory microwave test equipment for frequencies up to 18 GHz. APC-7 connectors are advantageous because they have a low-reflection coefficient, make repeatable coaxial connections, and are genderless.[1] The connectors are expensive, so they are seldom used outside the laboratory where their cost can be justified by their accuracy and convenience. Due to their high cost, their 18 GHz frequency limitation, and new laboratory practices,[2] the connectors are now uncommon. Modern low frequency microwave equipment often uses the less expensive 3.5 mm (26.5 GHz) connector. Higher frequency equipment must use higher performance connectors such as the 2.92 mm (40 GHz), 2.4 mm (50 GHz), 1.85 mm (67 GHz), or 1.0 mm (110 GHz) connectors.[3] FeaturesAPC-7 connector pairs have several desirable features:
AdaptersAPC-7 connectors require adapters to change from the connectors used in the laboratory to those used on everyday products. These adapters are expensive precision devices. For example, an APC-7 to type N (f) cost $105 in 1979.[4] Such adapters bought new today (as of July 2012) can cost as much as $294.[5] History"APC" stands for Amphenol Precision Connector and "-7" for 7 millimetres.[6] Hewlett-Packard started developing the connector in the mid-1960s. Amphenol improved the design and manufactured the connector.[1] Notes1. ^1 2 3 {{Harvnb|Hewlett-Packard|1979|p=90}} 2. ^Connections at the instrument front panel don't need to be repeatable because those connections remain mated during tests. Modern network analyzers focus on the reference plane near the device under test and have features such as automated calibration, adapter removal, and models for calibration references. The advantages of the APC-7 connector have been diminished. 3. ^{{cite web|url=http://www.microwaves101.com/encyclopedia/connectors.cfm|title=Microwaves101 - Microwave Coaxial Connectors|first=The Unknown|last=Editor|website=www.microwaves101.com}} 4. ^{{Harvnb|Hewlett-Packard|1979|p=87}} 5. ^{{cite web |url = http://www.keysight.com/en/pd-1000000324%3Aepsg%3Apro-pn-11525A/adapter-apc-7-to-type-n-m-dc-to-18-ghz|title = Agilent 11525A Adapter}} 6. ^{{cite web|url=http://www.amphenolrf.com/products/precision.asp?N=0&sid=4A4D4A002301E17F&|title=Capabilities - Custom RF Products and Engineered Solutions - Amphenol RF|website=www.amphenolrf.com}} References{{reflist}}
|last= Hewlett-Packard |title= Coaxial & Waveguide Catalog and Microwave Measurement Handbook |year= 1979 |publisher= Hewlett-Packard |id= 5952-8207D |location= Palo Alto, CA}} External links
1 : Coaxial connectors |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。