12 12, 2017

Common Applications for Radio Frequency (RF) Filters

By |2018-04-05T19:27:40+00:00December 12th, 2017|Design Innovation, RF Filters, RF Front End|

Radio Frequency (RF) Filters are special circuits that allow a signal of interest to pass through while attenuating any undesired signals.  And while there are a large number of different filter topologies, there are generally 4 filter responses, or shapes, when plotted in the frequency domain.  These four shapes are: Low Pass High Pass Band [...]

28 09, 2017

How can a Low Noise Amplifier improve my system’s performance?

By |2018-08-01T14:41:29+00:00September 28th, 2017|Design Innovation, RF Front End|

From the moment that a modulated Radio Frequency (RF) signal leaves a Power Amplifier and begins its journey to a receiver, the amplitude with respect to the ambient noise starts to decrease.  When the signal arrives at the receiver, it needs to be sufficiently higher than the noise for the receiver to properly demodulate the [...]

16 05, 2016

Will an RF Preselector Improve the Performance of My System?

By |2019-04-17T18:37:14+00:00May 16th, 2016|Product Development, RF Filters, RF Front End|

An RF Preselector (a.k.a an RF Tuner or “front-end”) is used to prevent out-of-band signals from entering the radio receiver. In a super-heterodyne type of receiver, front-end filtering is essential to prevent unwanted signals from degrading the performance of the receiver. Without filtering, the frequency conversion stage(s) of the receiver will convert all signals received [...]

26 02, 2016

How Do I Phase-Lock Two Signal Sources?

By |2019-04-17T17:55:20+00:00February 26th, 2016|Design Innovation, RF Front End|

There is often a need to phase-lock two or more RF signal sources so that there is no frequency drift between the signal sources. This discussion will be limited to the case where the RF signal sources are of the ubiquitous integer phase-lock loop (PLL) type. A necessary condition is that the two sources have [...]