mga-31189 Avago Technologies, mga-31189 Datasheet
mga-31189
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mga-31189 Summary of contents
Page 1
... With high IP3, wide bandwidth and low noise figure, the MGA-31189 may be used amplifier in transmitter/ receiver base station and point-to-point radio applications, as shown in Figure 1. The MGA-31189 operates with power supply and draws a nominal current of 111 mA at room temperature. This application note will describe ...
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... PCB Material and Layer Stack Design Figures 2 and 3 show the top and bottom views of the MGA-31189 demonstration circuit printed circuit board (PCB) with the component placement. The demonstration board is a three-layer board with a Coplanar Waveguide with Ground (CPWG) on the topside as RF traces and ...
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CPWG Design The dimensions of the CPWG lines can easily be determined using AppCAD, a free and easy-to-use RF simulation software package available from Avago. As shown in Figure 4, the overall thickness of the board is about 62 mils, ...
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... Broadband Access For most applications, all that is required to operate the MGA-31189 is to apply a DC bias and match the RF input and output. The following discussion describes a typical application for the MGA-31189 for four different IF bands. Design steps discussed include matching the input ...
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... Using EM Simulator to Determine the Optimum Load Reflection Coefficient (Γ Without OIP3 load-pull data difficult to match the MGA-31189 for optimum IP3. However, based on the existing 450 MHz, 900 MHz and 1500 MHz circuit data available in the datasheet and with the aid of an elec- tromagnetic (EM) simulator (i ...
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... Table 4. In order to fulfill the narrowband performance at 70 MHz, an L-C low-pass impedance matching configuration was chosen at the input and output of the MGA-31189 capacitor (C1) and 56 nH (L3) inductor are used for the input match. This combination will ensure good return loss performance at 70 MHz ...
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... Performance of the MGA-31189 at 70 MHz With a device voltage the MGA-31189 demonstra- tion board delivers a small signal gain of 21 dB, as shown in Figure 13. Figure 12 shows the return loss curves for the MGA-31189 when tuned for 70 MHz. The narrowband matching approach allows the MGA-31189 to produce an exceptionally good IRL of -20 dB and ORL of about -10 MHz. Figure 14 shows that the MGA-31189’ ...
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... MHz IF Amplifier Design Optimizing the MGA-31189 for best IRL and good IP3 at 170 MHz closely follows the 70 MHz design procedure, but the input and output tuning conditions must change for a different * that determines the optimum OIP3 location. L Figure 15 shows the schematic diagram for a complete 170 MHz circuit, and Table 6 shows the component part list ...
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... Figure 16. On the other hand, the ORL is about -10 170 MHz. Figure 18 shows the MGA- 31189’s reverse isolation is about -27 170 MHz. The MGA-31189 NF was measured to be about 2 170 MHz. As for linearity performance, the MGA-31189 exhibits 41dBm of OIP3 and 23.1 dBm of OP1dB at 170 MHz. Table 7 shows the MGA-31189’ ...
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... C4 2 820 Vdd C5 C=2 C=0 C L=820 nH L3 L=18 nH MGA-31189 Size Part Number 0402 MURATA, GRM1555C1H120JZ01 0402 MURATA, GRM1555C1H560JZ01 0402 MURATA, GRM155R71H102KA01 0402 MURATA, GRM155R71C104KA88D 0805 MURATA, GRM21BR61E225KA12L 0805 TOKO, LLQ2012-FR82 0402 TOKO, LL1005-FHL8N2J 0402 TOKO, LL1005-FHL18NJ C7 L2 L=8 ...
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... Performance of the MGA-31189 at 240MHz With supply, the MGA-31189’s small signal gain was measured to be 21.1 dB, as shown in Figure 21. IRL was -15.4 dB and ORL was -12 shown in Figure 20. The MGA-31189 delivered a noise figure of 2 240 MHz. Figure 22 shows the MGA-31189’s reverse isolation to be about - 240 MHz ...
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... 390 Vdd C5 C=2 C=0 C=220 pF L1 L=390 nH L3 L=4.7 nH MGA-31189 Size Part Number 0402 MURATA, GRM1555C1H2R7CZ01 0402 MURATA, GRM1555C1H1R2CZ01 0402 MURATA, GRM1555C1H221JA01 0402 MURATA, GRM155R71C104KA88D 0805 MURATA, GRM21BR61E225KA12L 0805 TOKO, LLQ2012-FR39 0402 TOKO, LL1005-FHL1N8S 0402 TOKO, LL1005-FHL4N7S L2 C7 L=1 ...
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... MHz IF band. With a Vdd and typical Idd of 110 mA, the device is produces 21 small signal gain, as shown in Figure 25, and an IRL of -23.9 dB and ORL of -10.8 dB, as shown in Figure 24. The MGA-31189 delivers a noise figure of 2 500 MHz. As for linearity, the MGA- 31189’s OIP3 is approximately 40 dBm for input tones of -12 dBm amplitude and 10 MHz frequency spacing, and OP1dB is approximately 23 ...
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... IF frequencies. Although this work covers only four IF frequencies (70 MHz, 170 MHz, 240 MHz and 500 MHz), the MGA-31189 can be tuned for other frequencies and applications within the 50 MHz to 2 GHz frequency range with the techniques discussed ...