Output Filter Section - NEC DTU-70 Instruction Manual

3-4

Output Filter Section

This section consists of the harmonic filter and low pass filter (optional) for suppressing
the spurious of the outputs of the power amplifier section. Also this harmonic filter
consisted of λ/4 short circuit is used to protecting against lighting.
Table 3-3 Attenuation characteristic of filters
※ The attenuation is specified at the band of 2fc±8MHz.
Filter Size
940-1000MHz
NAX-77D
NAX-39D
3 - 5
Attenuation[dB]
※
2fc
1000-1724MHz
62 56
56 50
GWP-G22996