THE AMP1800-U IS A COMPLETE 430MHZ-440MHZ LINEAR AMPLIFIER MODULE THAT INCORPORATES A PCB LOW PASS FILTER AS WELL AS A DIRECTIONAL COUPLER FOR FORWARD AND REFLECTED READINGS.
THE AMPLIFIER PALLETS CONSISTED OF LATEST TECHNOLOGY FREESCALE LDMOS WHICH ARE PLACED IN PUSH-PULL CONFIGURATION IN ORDER TO ENHANCE STABILITY AND EFFICIENCY. THE OUTPUT OF EACH PALLET IS ADDING IN PHASE IN OREDR TO DOUBLE THE POWER OUTPUT. THE USE OF THE PLANAR LOW PASS FILTER IS TO ELIMINATE ALL THE UNWANTED HARMONIC PRODUCTS. FINALLY, THE FORWARD AND REFLECTED POWER CAN BE DETECTED BY THE USE OF A DIRECTIONAL COUPLER WHICH IS ALSO A PART OF THE MODULE.