Wideband Amplifier MITEQ AMF5S-040080-12-13P

1/6 Wideband Amplifier MITEQ AMF5S-040080-12-13P Matthias, DD1US, December 2nd 2018 I am presently building a frequency doubler to extend my measureme...

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Wideband Amplifier MITEQ AMF5S-040080-12-13P Matthias, DD1US, December 2nd 2018 I am presently building a frequency doubler to extend my measurement setup to higher frequencies. I am using a frequency doubler from Hittite which need quite some drive power thus I decided to buy a MITEQ AMF5S040080-12-13P amplifier. There is little data in the internet but the part number suggested a frequency range from 4-8 GHz, a noise figure of 1.2dB and a 1dB compression point of 13dBm. As it is a 5-stage amplifier the gain should be quite high. All this fits my purpose of a frequency doubler with an input frequency range of 3-8 GHz as from my experience the frequency range of the Miteq amplifiers is typically wider than specified. Here are some pictures of the amplifier I bought:

I am not planning to mounted the amplifier on a dedicated heatsink but will rather mount on an aluminum plate where all the components of the doubler are placed. This should provide an adequate low thermal resistance to keep the amplifier cool enough. The amplifier is specified to operate at 15V DC and I measured a current 1/6

consumption of 120mA. My measurements showed very little degradation of gain and maximum output power when operating the amplifier at 12V. First, I measured the gain and the noise figure between 1.5 GHz and 10 GHz using a supply voltage of 15V.

The gain is about 42…44dB in the frequency range 3..9.5 GHz. The noise figure between 3…8 GHz is between 0.7 and 1.3dB. Here is a table of the measurement values from 1.5 GHz to 10 GHz (@Vs=15V). Frequency 1500 MHz 1600 MHz 1700 MHz 1800 MHz 1900 MHz 2000 MHz 2100 MHz 2200 MHz 2300 MHz 2400 MHz 2500 MHz 2600 MHz 2700 MHz 2800 MHz 2900 MHz 3000 MHz 3100 MHz 3200 MHz 3300 MHz 3400 MHz 3500 MHz 3600 MHz 3700 MHz 3800 MHz 3900 MHz

Gain 27.95 dB 29.47 dB 31.50 dB 33.43 dB 34.03 dB 34.90 dB 36.44 dB 38.00 dB 38.45 dB 38.89 dB 39.32 dB 41.59 dB 41.98 dB 42.16 dB 43.35 dB 42.96 dB 44.35 dB 43.12 dB 43.81 dB 44.31 dB 43.73 dB 44.19 dB 45.05 dB 44.03 dB 44.57 dB 2/6

Nf 3.44 dB 3.08 dB 2.74 dB 2.49 dB 2.25 dB 2.03 dB 1.85 dB 1.77 dB 1.62 dB 1.54 dB 1.48 dB 1.39 dB 1.30 dB 1.22 dB 1.16 dB 1.12 dB 1.09 dB 1.06 dB 1.04 dB 0.98 dB 0.94 dB 0.89 dB 0.84 dB 0.83 dB 0.80 dB

Temp 350.4 K 298.8 K 255.2 K 224.7 K 196.3 K 173.1 K 154.3 K 145.8 K 131 K 123.7 K 117.7 K 109.1 K 101.1 K 94.1 K 88.8 K 85 K 82.9 K 80.2 K 78.7 K 73.2 K 70.4 K 65.9 K 61.8 K 61.3 K 58.6 K

Frequency 4000 MHz 4100 MHz 4200 MHz 4300 MHz 4400 MHz 4500 MHz 4600 MHz 4700 MHz 4800 MHz 4900 MHz 5000 MHz 5100 MHz 5200 MHz 5300 MHz 5400 MHz 5500 MHz 5600 MHz 5700 MHz 5800 MHz 5900 MHz 6000 MHz 6100 MHz 6200 MHz 6300 MHz 6400 MHz 6500 MHz 6600 MHz 6700 MHz 6800 MHz 6900 MHz 7000 MHz 7100 MHz 7200 MHz 7300 MHz 7400 MHz 7500 MHz 7600 MHz 7700 MHz 7800 MHz 7900 MHz 8000 MHz 8100 MHz 8200 MHz 8300 MHz 8400 MHz 8500 MHz 8600 MHz 8700 MHz 8800 MHz 8900 MHz 9000 MHz 9100 MHz 9200 MHz 9300 MHz 9400 MHz 9500 MHz 9600 MHz 9700 MHz 9800 MHz 9900 MHz 10000 MHz

Gain 43.25 dB 43.68 dB 43.08 dB 43.65 dB 42.25 dB 42.80 dB 43.03 dB 41.74 dB 43.30 dB 42.80 dB 42.32 dB 42.95 dB 42.35 dB 42.77 dB 43.13 dB 42.72 dB 42.90 dB 42.34 dB 41.95 dB 43.66 dB 43.12 dB 43.26 dB 44.16 dB 42.41 dB 42.42 dB 43.35 dB 45.24 dB 44.09 dB 42.75 dB 44.07 dB 40.86 dB 43.05 dB 42.01 dB 44.59 dB 42.38 dB 41.94 dB 41.84 dB 42.09 dB 42.22 dB 42.48 dB 41.88 dB 43.12 dB 42.01 dB 43.01 dB 42.79 dB 42.51 dB 43.10 dB 42.82 dB 43.25 dB 43.96 dB 43.16 dB 43.38 dB 43.33 dB 42.31 dB 43.76 dB 42.48 dB 44.18 dB 41.86 dB 42.62 dB 40.39 dB 40.08 dB 3/6

Nf 0.77 dB 0.74 dB 0.73 dB 0.65 dB 0.67 dB 0.68 dB 0.70 dB 0.68 dB 0.68 dB 0.70 dB 0.70 dB 0.75 dB 0.76 dB 0.79 dB 0.85 dB 0.86 dB 0.88 dB 0.93 dB 0.96 dB 0.99 dB 1.02 dB 1.02 dB 1.06 dB 1.11 dB 1.10 dB 1.13 dB 1.14 dB 1.14 dB 1.12 dB 1.15 dB 1.16 dB 1.00 dB 1.16 dB 1.19 dB 1.15 dB 1.18 dB 1.19 dB 1.18 dB 1.23 dB 1.24 dB 1.29 dB 1.27 dB 1.31 dB 1.30 dB 1.32 dB 1.37 dB 1.38 dB 1.43 dB 1.44 dB 1.44 dB 1.50 dB 1.52 dB 1.55 dB 1.55 dB 1.60 dB 1.61 dB 1.62 dB 1.64 dB 1.64 dB 1.60 dB 1.63 dB

Temp 56.1 K 54.3 K 52.9 K 47.1 K 48.5 K 49.3 K 50.5 K 48.8 K 49.1 K 51.1 K 50.8 K 54.4 K 55.8 K 57.5 K 62.5 K 63.9 K 65.4 K 69.3 K 71.9 K 73.9 K 76.7 K 76.9 K 79.9 K 84.9 K 83.9 K 86 K 87 K 87.3 K 85.7 K 88.3 K 88.4 K 75.2 K 88.6 K 91 K 88.3 K 90.5 K 91.2 K 90.7 K 95 K 95.5 K 100.4 K 98.7 K 102.4 K 101.2 K 103.3 K 107.6 K 108.5 K 113 K 114.1 K 113.9 K 119.3 K 121.2 K 124.3 K 124.7 K 128.7 K 129.8 K 131.4 K 132.6 K 133 K 128.9 K 131.9 K

Next I measured the frequency response when applying higher input power. The next diagram shows the output power versus frequency when driving the amplifier with -30dBm (yellow curve) and -20dBm (blue curve).

At an input power of -30dBm the amplifier is still in the linear mode. The amplifier can deliver +16dBm when driving it in saturation. The 1dB compression point is approximately +13dBm as assumed based on the part number.

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Here are the spectra of the amplifier when driving it with -30dBm and -20dBm (@ fin=3 GHz)

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As to be expected the harmonics are increasing drastically when driving the amplifier in saturation. Over all I derived the following parameters of the Miteq AMF5S-040080-12-13P amplifier based on my own measurements: Vs=12...15V Is=130mA f=3...8Ghz Gp=42...44dB Nf=0.7...1.3dB P1dB ca. +13dBm Psat=16dBm I am always grateful to get feedback and will be happy to answer questions. Please direct them to the Email address which you will find below. Best regards Matthias DD1US Email: [email protected]

Homepage: http://www.dd1us.de

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