Amplifier Bypass Sample Kit Knowles

Bypass Capacitor Kit for MMIC Amplifiers High Performance MMIC Amplifiers High frequency MMIC amplifiers with broadband gain need to be protected from RF noise on the supply lines, particularly RF energy coupled back into the device from its output. Supply noise creates challenges in RF systems where it can mix with RF signals, impacting signal/noise ratios and potentially causing spurious output. Avoiding this requires the use of a bypass capacitor that provides an efficient path to ground for RF energy on the supply line before it enters a gain stage. See Figure 1 for example. FIGURE 1 VDD High performance Bypass Capacitor MMIC amplifiers contain multiple stages, each requiring their own bypassed supply. RF In RF Out V-Series Our V-Series capacitors feature X7R characteristics up to 200V DC voltage rating, with a frequency range up to 40GHz and operating temperature of -55C to 125C. Figure 2 shows that selecting the correct capacitor for this application involves finding a microwave capacitor that provides the required isolation when tested on a board in shunt. Figure 3 shows the RF isolation of our V-Series capacitor tested in such a configuration. FIGURE 2 FIGURE 3 Typical Insertion Loss (S21) 0 -10 -20 RF In RF Out -30 -40 -50 V30BZ102M6SX -60 V30BZ222M8SX Bypass Capacitor V30BZ472M1SX -70 V30BZ682M1SX V30BZ103M1SX -80 -90 0 5 10 15 20 25 30 35 40 Frequency (GHz) www.knowlescapacitors.com Loss (dB)Contents of the Amplifier Bypass Kit Vials with SLC - Border Cap SLC PART NUMBERS IN VIALS: V SERIES KIT: D25BN121M1EX V30BZ102M6SX D25BN101M1EX V30BZ222M8SX D20BN101M1EX V30BZ472M1SX D25BJ680M1EX V30BZ682M1SX D50BD680K1EX V30BZ103M1SX Key Factors Isolation performance at microwave frequencies, CV density (capacitance and voltage capability in a given footprint) and the quality of the wire bond and ground-facing surfaces of the device are key factors to consider. Voltage handling to 200V Typical GaN application requires x2 rated voltage X7R (-55C to +125C) BORDER CAP : V-SERIES: Frequency range up to 80GHz Frequency range up to 40GHz 0.02pF to 2.4nF 1nF to 10nF Up to 100V Up to 200V Superior Microwave Performance Wire Bond Optimized Request a sample kit to get your project off the ground. www.knowlescapacitors.com