A balanced, output matching filter, aimed at 2.4GHz wireless applications; using ZigBee and Bluetooth low energy technologies has been developed. The new filter from Murata has been designed for use with wireless connectivity system-on-chips (SoCs): CC253x and CC254x for ZigBee and Bluetooth technology networking respectively from Texas Instruments.
The solution is claimed to be the world’s smallest filter available, measuring 1.6 by 0.8mm and incorporates all the necessary RF circuitry of a matching network, balun and filter within a single package.
This is a six-pin space saving device that uses very little board space, BOM count so engineering effort is kept to a minimum.
Compared with a traditional inductor and capacitor design, the LFB module replaces nine discrete 0402 components.
In comparison to the original reference design, spurious emissions are improved by 11dB. Also, harmonic performance is 20dB better at 2xfc and 3xfc.
The LFB182G45BG2D280 device has an unbalanced port impedance of 50ohm and a frequency range of 2,450MHz +/- 50MHz.
It also has a power capacity of up to 500mW maximum.
