The Arduino platform lends itself nicely to other pursuits, and one of these is amateur radio. Without too much work you can create control, morse and measurement devices - and one example is the following power and SWR (standing-wave ratio) meter by Jean-Jacques De Rey, ON7EQ. His device has three modes - display of instantaneous power forward and SWR, peak power forward and can also alert of various SWR values with different types of beeps.
You can't just feed the RF from your rig directly to the Arduino, as an SWR bridge is required, however everything is explained including hardware and the required sketch. For complete information check out Jean-Jacques' website. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
If you're using an LCD with your Arduino-based projects - instead of building your own LCD module onto a breadboard, save time and move forward with the Freetronics LCD & Keypad shield which contains a bright 16x2 character LCD and five buttons that can be read from only one analog input pin: