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参数资料
| 型号： | 142-1000-002 |
| 厂商： | Emerson Network Power Connectivity Johnson |
| 文件页数： | 2/4页 |
| 文件大小： | 0K |
| 描述： | CONN HERMETIC SEAL .015" PIN SMA |
| 标准包装： | 25 |
| 系列： | SMA |
| 附件类型： | 真空密封 |
| 适用于相关产品： | SMA 连接器 |
| 特点： | 馈通 |
| 其它名称： | 1421000002 J567 |
SMA - 50 Ohm Connectors
Field Replaceable - Application Notes
INCHES (MILLIMETERS)
CUSTOMER DRAWINGS AVAILABLE UPON REQUEST
The field replaceable style of connector is known by many names in the industry, such as MIC launcher, hermetic seal launcher, spark plug
launcher, etc. Some types, such as those known as “spark plugs”, have the hermetic seal incorporated into the connector. Thes e types
require special welding to install and can not be replaced without destroying the hermeticity of the circuit housing. True fie ld replaceable
connectors, such as those manufactured by Johnson Components TM , are easy to install and replace. Because the hermetic seal is not
incorporated into the connector design, the connector can be removed and replaced without destroying the hermetic seal or the h ermeticity
of the circuit housing.
All of the above mentioned connector types perform the same basic function - creating a transition from microstrip circuitry to a coaxial
transmission line. Whenever possible, the hermetic seal pin diameter should be chosen as close as possible to the microstrip t race width.
For optimum electrical performance, the transition from the hermetic seal to the microstrip trace must be properly compensated. Compen-
sation involves adjusting the microstrip trace width to minimize any impedance discontinuities found in the transition area.
The plot shown below is representative of the typical return loss of an Johnson Components TM field replaceable connector. To produce the
data shown below, a test fixture is created using the appropriate Johnson Components TM hermetic seal. The fixture consists of a suitably
thick spacer plate with the hermetic seal mounted flush to both surfaces. Two connectors are mounted back to back around the f ixture and
the VSWR of this test assembly is measured. The return loss data shown is equivalent to the square root of the measured VSWR o f the
test assembly. Since the connectors tested are of identical design, it can be stated with fair accuracy that the data shown re presents the
response of a single field replaceable connector and its transition to the hermetic seal.
Although Johnson Components TM does not publish a VSWR specification for field replaceable connectors, typical connector VSWR can be
expected to be less than 1.1 + .01f (f in GHz). A VSWR specification is not stated because an industry standard method for tes ting field
replaceable connectors does not exist. The actual performance of the connector is dependent upon the application for the follo wing
reasons:
1.
2.
3.
The choice of hermetic seal to be used by the customer is not specified by the connector manufacturer. Hermetic seals produc ed
by different manufacturers will not have the same electrical characteristics. For optimum electrical performance, Johnson Comp o-
nents TM recommends the use of our standard 142-1000-001, 002, 003 and 004 hermetic seals for pin diameters of .012 (0.30),
.015 (0.38), .018 (0.46) and .020 (0.51). Custom hermetic seal configurations can be quoted.
It is recommended that the hermetic seal be mounted flush with the circuit housing. Tolerance variations between the hermeti c
seal and machined housing do not always guarantee an optimum transition to the connector. Some manufacturers recommend
an additional counterbore in the circuit housing to accommodate a solder washer during installation of the seal. Johnson Compo -
nents TM does not recommend this type of installation because if the counterbore is not completely filled with solder, electrical
discontinuities may be created.
The transition between the hermetic seal pin and the microstrip trace will affect electrical performance, as stated above. S everal
different methods of hermetic seal mounting and seal pin to microstrip trace attachment are used in the industry. Johnson
Components TM can not recommend one method over the other as this is dependent upon the customer ’s application.
As always, quotes for non-standard field replaceable connectors and/or hermetic seals are welcome.
Emerson Network Power Connectivity Solutions
299 Johnson Avenue SW, Waseca, MN 56093 ? 800 -247- 8256 ? +1 (507) 833-8822 ? www.EmersonConnectivity.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 142-1000-003 | 功能描述:RF 连接器 HERMETIC SEAL FEEDTHROUGH RoHS:否 制造商:Bomar Interconnect 产品:Connectors 射频系列:BNC 型式:Jack (Female) 极性: 触点电镀:Gold 阻抗: 端接类型:Solder 主体类型:Straight Bulkhead 电缆类型: |
| 142-1000-004 | 功能描述:RF 连接器 HERMETIC SEAL FEEDTHROUGH RoHS:否 制造商:Bomar Interconnect 产品:Connectors 射频系列:BNC 型式:Jack (Female) 极性: 触点电镀:Gold 阻抗: 端接类型:Solder 主体类型:Straight Bulkhead 电缆类型: |
| 142-1000-005 | 制造商:EMERSON NETWORK POWER 功能描述:Connector Accessories Hermetic Seal Feed Through |
| 142-1000-012 | 功能描述:RF 连接器 EPOXY STAKED FEEDTHROUGH RoHS:否 制造商:Bomar Interconnect 产品:Connectors 射频系列:BNC 型式:Jack (Female) 极性: 触点电镀:Gold 阻抗: 端接类型:Solder 主体类型:Straight Bulkhead 电缆类型: |
| 142-1000-015 | 制造商:Johnson Components 功能描述:- Bulk |
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