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.

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

Material & Finish

Test Result

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

Cross RF is an industry leading producer of custom cable assemblies to the test equipment, cellular, radio frequency, microwave, industrial, aerospace and military markets.

Focusing on RF / Microwave cabling solutions, we have professionalism in terms of product Quality, Competitive Pricing and rapid OEM capacity. The following is the factors why you can rely on our cable assemblies.

RF/Microwave Attenuators