A frequency multiplier is a circuit that makes output signal frequency equal to an integer multiple of input signal frequency If input frequency is f1, the output frequency is f0=nf1, and coefficient n is 2. Frequency multipliers are widely used. For example, a mitter can use a frequency multiplier to make master oscillator oscillate at a lower frequency to improve frequency stability; frequency modulation equipment uses a frequency multiplier to increase frequency deviation; in phase-keyed communication devices, frequency multipliers are an important component of carrier recovery circuit. Power supply voltage: No power supply required, passive frequency multiplier device is used Input frequency: 4.0-8GHz input, output frequency range 8.0--16.0GHz. Input power: +10dBm--+15dBm, typical +13dBm input. Frequency multiplication loss: 17dB Isolation: 42dB (1F0, 3F0, 4F0) (The product appearance and printed words depending on batch, but this does not affect use) Color: Green Material: PCB Package Contents: 1 x Frequency Multiplier Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.