MMCX :: Micro-Miniature Connector series

Posted on February 13, 2009 by Cross RF

This is one of the smallest design of RF connector line with 50 Ohm impedance and up to DC 6 GHz usage. By incorporating a lock-snap mechanism, it allows easy latching and high flexibility on PCB layouts.
Cross RF offers a range of MMCX connectors that are applicable to different applications including UT series Semi-Flexible and RG/LMR series Flexible cable assembly, and surface mount.

Requirement	MIL-C-39012 Paragraph	Specification

ELECTRICAL DATA
Impedance		50Ω
Frequency range		DC 6GHz
Contact current		DC 1.0A max.
Voltage rating		170V rms
Contact resistance		Center contacts : 5.0 mΩ
Contact resistance		Outer contacts : 2.5mΩ
Insulation resistance		1000MΩmin.
V.S.W.R		≤ 1.2 at 2GHz

MECHANICAL DATA
Engagement force		max. 15N
Separation torque		min.6N ~ max.15N
Life	3-15	500 matings.
Contact captivation	3-14	10N

ENVIRONMENTAL DATA
Temperature range	3-13	: -65℃~+125℃
Corrosion resistance	3-21	MIL-STD-202, Method 101,Condition B.
Moisture resistance	3-20	MIL-STD-202, Method 106.
Thermal shock	3-18	MIL-STD-202, Method 107,Condition B.
Vibration		MIL-STD-202. Method 204,Condition D.

MATERIALS
Bodies		Brass
Outer contacts		Beryllium copper
Insulators		PTFE Teflon

PLATINGS
Bodies		Gold plated
Center contacts		Gold plated

MMCX INTERFACE DIMENSIONS

Click here to view MMCX catalog page.

Take a control of signal – High Power Attenuators

Posted on February 5, 2009 by Cross RF

Need an effective and reliable control of power of signal? Then, Cross RF may have a right answer for your application.

Cross RF High Power Attenuator

Introduce our entire line of High Power Attenuators; applicable to any source of dynamic range of devices including power meters and amplifiers.

Cross RF offers the most common types of connector interfaces – N, 7/16 with average power ratings from 2 – 250 watts available from stock in 3, 6, 10, 20 & 30 dB and SMA in 1 to 30dB by 1dB increment.

Type N and 7/16 covers upto DC to 3GHz applications.

Custom-to-design product takes 3 weeks for delivery.

Visit our website to review available atteuator products.

TIMES LMR100; LMR®-100A; CABLE ASSY; 50 OHM

Posted on January 26, 2009 by Cross RF

ttenuation Guide
Frequency (MHz)	dB/100ft (dB/100M)
150	8.9 (29.4)
220	10.9 (35.8)
450	15.8 (51.9)
900	22.8 (74.9)
1,500	30.1 (98.7)
1,800	33.2 (109.0)
2,000	35.2 (115.5)
2,500	39.8 (130.6)

Ideal for those usage in :

Drop-in Replacement for RG-316/RG-174 (uses standard connectors)
Jumper Assemblies in Wireless Communications Systems
Short Antenna Feeder runs
Any applications (e.g. WLL, GPS, LMR, Mobile Antennas) requiring an easily routed, low loss RF cable

FME configurations are now available.

Posted on January 18, 2009 by Cross RF

Cross RF (www.crossrf.com) recently expanded its range of configurable connector options to FME series. Cross RF now has the ability to process custom cable assemblies with FME straight plug or jack.

FME is mobile equipment connectors. The most common usage of FME is for mobile antenna applications. It is a miniature screw coupling coaxial that has a 50 Ohm impedance. They offer excellent electrical performance from DC to 200 MHz.

To retain the highest flexibility in application, RG-174, RG-316 or RG-58 flexible cables are recommended.

FME STRAIGHT PLUG FOR RG 174

SPECIFICATION
NO.	DESCRIPTION	MATERIAL	NOTE
1	BODY	MBsBD	Nickel
2	PIN	MBsBD	Gold Plating
3	INSULATOR	PTFE
4	PIPE	MBsBD	Nickel

About Cable Constructions

Posted on December 6, 2008 by Cross RF

Conductor

Solid of stranded silver plated copper (SPC) and silver plated copper clad steel (SPCW) and silver covered copper(SC) and silver covered copper clad steel(SCCS) wires with 40 micro inch minimum silver plating thickness for all configurations.

Dielectric

All of the high temperature, high performance coaxial cable listed have PTFE dielectrics with high dielectric strength and low capacitance in proportion to the dielectric constant. All PTFE dielectrics are manufactured with tolerances tighter than the MIL-C-17 specification to ensure uniformity of electrical characteristics, especially impedance, attenuation and VSWR.

Outer Conductor (Shield)

High temperature braids of silver copper (SPC) wire with a 40 micro inch minimum silver plating thickness are designed in accordance with the appropriate MIL-C-17 specification.

Jacket

Exttuded fluorinated ethylene propylene (FEP) is available. The FEP is excellent because of its high temperature resistance and chemical inertness.

Terminology of RF/Microwave cables

Posted on December 6, 2008 by Cross RF

Attenuation

There are two types of losses with a MIL-C-17 coaxial cable. The first results from the dielectric properties of the core and the second is from conductor losses. The use of PTFE as a dielectric provides the lowest dielectric constant and is very stable over a wide range of temperature and frequencies. The conductor losses depend on the base material of the conductor and shield along with the plating of each, especially in higher frequency ranges.

V.S.W.R (Voltage Standing Wave Ratio)

The VSWR is the vector addition of the impedance changes along the length of a cable. The variations can be random or periodic. A resonance can occur at a particular frequency resulting in a VAWR spike. These impedance changes will often be related to a process during manufacturing. Because of the ram extrusion process for manufacturing PTFE dielectrics, most of the dielectric manufacturiog spikes are not present. The VSWR will change with frequency.

Characteristic Impedance

MIL-C-17 coaxial cable are available with characteristic impedance values 50, 75 and 95 ohms. Most systems use 50 ohms because it allows for maximum power transmission with minimum loss. The 75 ohms cables are more common in cable TV transmission where minimum cable attenuation. The 95 ohms cables are typically used for data transmission applications.

Mini Coax, Hirose U.FL Compatible (U.FLx) RF Connector series

Posted on November 28, 2008 by Cross RF

: CROSS RF Miniature Coax Series

Cross referenced to Hirose U.FL and I-PEX MHF-II series, Cross RF (www.crossrf.com) Miniature Coaxial (MC) RF Connector series features Max mating height 2.5mm and 1.8mm with equivalent or exceed thr electrical features of VSWR 1.35 Max at 7 GHz.

Specially designed to minimize mating space on the circuit boards and mount vertically on RF boards.

Features

Fully compatible with Hirose U.FL and I-PEX MHF-Ⅱseries
DC to 7 GHz (VSWR <1.35)
Cable assembly of 0.70mm, 0.81mm, 1.13mm, 1.30mm and Semi Flexible cables
Mated heights of 1.80 mm and 2.50 mm
Vertical mountable on receptacle (SMT)

Applications

Navigation, DMB, PDA, Notebook PC, GPS, Wireless LAN , Bluetooth
GSM, GPRS & CDMA mobile Phones
Measurement instruments and test systems
PCI / Cellular Phone (CDMA, GSM) / GPS / Bluetooth

Mated Height & Dimension

Two connector height options are available:

U.FLx-LP (Cross Reference to Hirose UFL-LP series) Plug (Max. 2.5mm Mated Height)
U.FLx-LP(v) (Cross Reference to Hirose UFL-LP(v) series) Plug (Max. 1.8mm Mated Height)
Mated Height (Unit: mm)

Cable Guide

U.FL-H25 (H 2.5mm Max)

070 (Dia : 0.70 mm) – SS&B*
081 (Dia : 0.81 mm) – SS&W*
113 (Dia : 1.13 mm) – SS&G&B*
130 (Dia : 1.30 mm) – SS&G*
132 (Dia : 1.32 mm) – DS& G*
137 (Dia : 1.37 mm) – SS& B*

U.FL-H18 (H 1.8mm Max)

070 (Dia : 0.70 mm) – SS&B*
081 (Dia : 0.81 mm) – SS&W*
113 (Dia : 1.13 mm) – SS&G&B*

* (SS : Single Shield, DS : Double Shield, B : Black color, W : White color)

Usage Precautions

Do not apply an excessive load to the cable when mated

Specifications

Item	Specifications	Conditions
Impedance	50 ohm ± 1	TDR Measurement
Insulation Resistance	500 M Ohms min.	100V DC
	070 (Dia : 0.70 mm) SS, U.FLx-LP-H25 on both ends	1.35 Max. up to 7 GHz
	081 (Dia : 0.81 mm) SS, U.FLx-LP-H25 on both ends
	113 (Dia : 1.13 mm) SS, U.FLx-LP-H25 on both ends
	130 (Dia : 1.30 mm) SS, U.FLx-LP-H25 on both ends
VSWR	132 (Dia : 1.32 mm) DS, U.FLx-LP-H25 on both ends
	137 (Dia : 1.37 mm) SS&, U.FLx-LP-H25 on both ends
	070 (Dia : 0.70 mm) SS, U.FLx-LP-H18 on both ends
	081 (Dia : 0.81 mm) SS, U.FLx-LP-H18 on both ends
	113 (Dia : 1.13 mm) SS, U.FLx-LP-H18 on both ends
Unmating Force	0.2 N min.	Measured by a 0.5mm pin gauge
Durability	Contact Resistance Center : 20 m Ohms max. Outside : 10 m Ohms max.	30 cycle
Humidity (Steady State)	No damage, cracks or parts dislocation. Insulation resistance 100M Ohms min. (when high humidity) Insulation resistance 500M Ohms min. (when dry)	96 hours at temperature of 40 ℃ and humidity of 95%

Material & Finish

Parts	Components	Materials	Finish
	shell	phosphor bronze	silver plated
Plug	insulator	PBT	black color
	center contact	phosphor bronze	gold plated
	shell	phosphor bronze	silver plated
Receptacle	insulator	LCP	beige color
Receptacle	center contact	brass	gold plated

Test Result

113 (Dia : 1.13 mm) SS, U.FL-LP-H25 on both ends

113 (Dia : 1.13 mm) SS, U.FLx-LP-H25 on both ends

113 (Dia : 1.13 mm) SS, U.FL-LPx-H25 on both ends test result

Product Notice: SMA 2-HOLE/4-HOLE FLANGE Connectors for Cables

Posted on November 25, 2008 by Cross RF

Cross RF introduce a series of 2-HOLE and 4-HOLE Flange connectors for cable assemblies. These types of connectors are specially designed to be used for panel mounting purposes.

SMA and MCX interfaces are available for 2-HOLE and 4-HOLE options, and BNC, TNC, and N types are available in 4-HOLE Flange option only.

SMC 2 HOLE Flange Connector

N 4 HOLE Flange Connector

Cross RF made your Online Shopping Easier.

Posted on November 22, 2008 by Cross RF

As a part of our ongoing efforts to improve our customer’s shopping experience, now we activated on-site credit card payment option. Supported by Authorize.Net, the industry’s leading online payment gateway, now our customers can enjoy shopping at Cross RF website (www.crossrf.com) easier and safer.

By enabling the Advanced Integration Method with Fraud Detection Suite (FDS)™, every transaction is now more secure. Our customers shopping experience is important; Cross RF offers the permanent shopping cart, multiple shipping addresses, order update, and the 128bit SSL encryption tools to secure your personal and company data.

Visit our website and experience the difference.

For customer support, email us support@crossrf.com

SMA RP (Reverse Porlarity) is now configurable.

Posted on November 16, 2008 by Cross RF

SMA RP (Reverse Polarity)

CrossRF has expanded the applicable connector options to SMA RP (Reverse Polarity) for the most of cable assemblies including RG, LMR, Semi-flexible and Semi-rigid cables.

SMA RP is designed for applications such as wireless antennas and WiFi. The conncetor body and center contacts are brass with Gold plating for greater electrical features.

Now SMA RP is available on our website at www.crossrf.com. You can order custom cable assemblies built to your specific length with a variety of other connector options including SMA, SMB, SMC, N, BNC, TNC, MCX, and MMCX.

With our website catalogue, ordering a cable assembly is simple; navigate our cable list and click, then it will list up configurable connector options for a specific cable.