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ADF7030-1 bảng dữ liệu(PDF) 10 Page - Analog Devices |
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10 / 15 page UG-957 ADF7030-1 Hardware Reference Manual Rev. 0 | Page 10 of 15 RF MATCHING NETWORKS The purpose of the matching networks is to maximize power transfer from the relevant PA to the antenna, from the antenna to the LNA, and to minimize reflections due to impedance mismatch. With separate matches, each PA or LNA has an individual matching network to a switch or antenna. PA1 SEPARATE MATCHING NETWORK Figure 7. 862 MHz to 928 MHz Harmonic Filter and Matching Network for PA1 Figure 8. 433 MHz to 470 MHz Harmonic Filter and Matching Network for PA1 Figure 9. 169 MHz Harmonic Filter and Matching Network for PA1 A shunt capacitor and two series inductors match consisting of L14, L16, and C2 is used for all PA1 matching networks. Additionally, when operating at 169 MHz, a harmonic termination circuit consisting of L16, C41, and R7 is required. The other components, L11 and C20, are a choke inductor and a dc blocking capacitor, respectively. The PA is matched to 50 Ω and the input and output impedances of the harmonic filter are also 50 Ω. Table 6 (LFCSP) and Table 7 (LQFP) list the matching components for PA1. Table 6. PA1 Matching Components for 40-Lead LFCSP Variant Component Value at 169 MHz Value from 430 MHz to 470 MHz Value from 860 MHz to 930 MHz C15 27 pF 6.8 pF Not applicable C16 27 pF 6.8 pF 2.7 pF C20 100 nF 270 pF 56 pF C21 15 pF 6.8 pF 2.7 pF C41 33 pF Not applicable Not applicable L1 12 nH 19 nH Not applicable L2 47 nH 33 nH 11 nH L3 12 nH 19 nH 11 nH L6 82 nH 23 nH 13 nH L11 470 nH 82 nH 40 nH L14 82 nH 19 nH 13 nH L16 27 nH Not applicable Not applicable R7 50 Ω Not applicable Not applicable Table 7. PA1 Matching Components for 48-Lead LQFP Variant Component Value at 169 MHz Value from 430 MHz to 470 MHz Value from 860 MHz to 930 MHz C15 27 pF 6.8 pF Not applicable C16 27 pF 6.8 pF 2.7 pF C20 100 nF 270 pF 56 pF C21 15 pF 6.8 pF 3.3 pF C41 33 pF Not applicable Not applicable L1 12 nH 19 nH Not applicable L2 47 nH 33 nH 11 nH L3 12 nH 19 nH 11 nH L6 82 nH 23 nH 11 nH L11 470 nH 82 nH 40 nH L14 82 nH 19 nH 9 nH L16 27 nH Not applicable Not applicable R7 50 Ω Not applicable Not applicable L2 L3 C20 DC BLOCK C16 L14 L3 L11 PA1 MATCH HARMONIC FILTER C21 PAOUT1 CREG3 L1 L3 L2 C20 DC BLOCK C16 C15 L14 L3 L11 PA1 MATCH HARMONIC FILTER C21 PAOUT1 CREG3 L1 L3 L2 C20 DC BLOCK C16 C15 L14 L3 C41 L3 R7 L11 PA1 MATCH HARMONIC FILTER C21 PAOUT1 CREG3 |
Số phần tương tự - ADF7030-1 |
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Mô tả tương tự - ADF7030-1 |
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