The Medicina IRA-SKA Engineering Group

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Figure 6.9 : Second stage layout sketch Figure 6.10: Picture of the second stage prototype <strong>The</strong> S11 (matching) and S21 parameters are here reported: S11 = -8.4 dB S21 = 17.2 dB NF (system) = 1.45 dB OIP3 = 29.0 dBm P1dBin = 3.6 dBm P1dBout = 19.8 dBm measured @ 408 MHz <strong>The</strong> OIP3 is measured with 2 tones at 407.5 and 408.5 MHz at -19 dBm at the D.U.T. input. P1dBin = 3.54 dBm, P1dBin = 3.67 dBm, S21 = 17.4 dB @ 405 MHz S21 = 17.2 dB @ 411 MHz Figure 6.11 – 6.12 show some graphs with the main characteristics; 36
Figure 6.11: Simulation and measure comparison Figure 6.12: Measured S11 and S21 of the second stage prototype 37
Page 1 and 2: The Medicina IRA-SKA Engineering Gr
Page 3 and 4: 1.0 Introduction. The Northern Cros
Page 5 and 6: Figure 1.2: An artistic black and w
Page 7 and 8: Figure 2.1: Overall view of the N/S
Page 9 and 10: At present each 128 dipoles are sum
Page 11: Figure 3.0: Fully digital beamformi
Page 14 and 15: 4.0 NORTHERN CROSS UPGRADE PLAN We
Page 16 and 17: Figure 4.3: Pictorial view of the c
Page 18 and 19: the IF frequency value (30 MHz, BW=
Page 20 and 21: It can be noted in this table that
Page 22 and 23: Figure 4.13: Total beam on the tran
Page 24 and 25: Figure 4.16 : Block diagram of the
Page 26 and 27: 4.3.2 FOV of the E/W in the differe
Page 28 and 29: E/W: 1- 24 receivers (24-1) = 23 2-
Page 30 and 31: At the preparation time of this pap
Page 32 and 33: Figura 6.2: Electrical diagram of t
Page 34 and 35: Figure 6.5: Measured S11 and S21 of
Page 38 and 39: First Test: In order to test qualit
Page 40 and 41: Figure 6.16: Filter evaluation test
Page 42 and 43: The Vector Modulator At present the
Page 44 and 45: - The digitiser - First test of tra
Page 46 and 47: labs gives a cost of about 100 Euro
Page 48 and 49: 9.0 Time Schedule Since at present

The Medicina IRA-SKA Engineering Group

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