Smyrna, Ga. - By utilizing innovative assembly processes and simplifying product design, Murata Electronics has launched its next generation 2 GHz band isolator for digital mobile phones in a smaller package size with higher performance levels. The CES30 series 2 GHz band isolator can be used in digital mobile phone systems such as 1.5 GHz band PDC, 2 GHz band W-CDMA and 1.9 GHz band PCS systems. The W-CDMA version is available today.
Murata claims the miniaturized band isolator, which measures 3.2 mm x 3.2 mm x 1.6 mm and weighs 0.06 grams, is the smallest among the industry's 2 GHz band isolators. Standard packages measure 4 mm x 4 mm x 1.6 mm.
In addition to the small size, several electrical characteristic improvements were made. These include an insertion loss of 0.5 dB maximum, and an isolation of 14.5 dB minimum in the frequency band from 1920 MHz to 1980 MHz over the standard operating temperature range of -40 degrees C to 80 degrees C. The company also reduced the voltage standing wave ratio (VSWR) rating of 1.4 to 1.25 maximum at the input.
Typically, the manufacture of isolators is assembly-intensive, said Scott Klettke, market segment manager for Murata North America. Murata simplified the process by eliminating several steps that were part of the standard process in making the isolators, he said.
To simplify the design and improve yields, Murata uses a new high precision electrode patterning technology that prints the electrode onto the ferrite instead of wrapping copper electrodes around the ferrite as in previous versions, which is a manual assembly process. The company has also developed a ceramic multilayer substrate that can integrate these capacitors with a resistor.
By implementing the new processes, Murata also expects to lower the cost of the isolators. This becomes significant in handset designs particularly for CDMA applications where designers use an isolator as an insurance policy to primarily protect the power amplifier, which is typically the most expensive component on the board, Klettke said.
"If you have a good design and everything is matched perfectly you don't have to use an isolator. Most customers will use it, however, with the current cost point it's easy to design it out," Klettke said.
Pricing for samples is $2.70 each. Call Murata for volume pricing. Delivery for samples is four to six weeks. Delivery for volume orders is 10 weeks.
Call (770) 433-5782