InGaPGaAs HBT MMIC Amplifier with Active Balun for Ultra-Wideband by yte37472

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									 InGaP/GaAs HBT MMIC Amplifier with Active Balun
  for Ultra-Wideband Self-Complementary Antenna
        Wireless communication system
    UWB system ( 3.1 GHz ~ 10.6 GHz )


Developed Self-Complementary Antenna in Honjo Lab. :


For driving the Self-Complementary Antenna,
Amplifier with Balanced Output is needed.
                                 Unbalanced
                                 mode                                                    Antenna

        Wideband                                                    Impedance
                                         Balun
        Amplifier                                                   transformer
Input
                                                                                                                       Common mode negative feed back amplifier                                                                Active Balun

                                               Balanced
                                                                                                                                                                                                                                         Connected to
                                               mode                                                                                                                                                                           5.9V       Self-Complementary antennas



   Working with coalition in MMIC                                                                                                    5.5V
                                                                                                                                           Peaking
                                                                                                                                                        4.5V
                                                                                                                                                                                                        40É∂       0.465nH
                                                                                                                                                                                                                             30É∂       27É∂
                                                                                                                                                                                                                                                0.465nH      40É∂
                                                                                                                                     100É∂ Inductor
  to miniaturization.                                                                                                                        0.745nH
                                                                                                                                                                            250É∂ output
                                                                                                                                                                                  PORT2
                                                                                                                                                                                                                    0.5pF    2pF        2pF      0.5pF
                                                                                                                                                                                                                                                                 output
                                                                                                                                                                                                                                                                 PORT3

                                                                                                                          T-type
                                                                                                                        attenuator
                                                                             Antenna                                                                                  0.185nH 1.0pF
                                                                                                                       8.5É∂ 8.5É∂                                                                          LC-ladder                          5.8V
                                                                                                                                                               80É∂
                                                                                                                                                                                                         matching network
                                         Amplifier with                                                  Input                     0.8pF      600É∂
                                                                                                        PORT1                 142É∂                        100É∂
                                         Active Balun                                                                                      Feed back                                                                   0.5mA
                                 Input                                                                                                      resistor


                                                                                                                               Equivalent circuit for designed InGaP/GaAs
                                                                                                                               MMIC Amplifier with Active Balun.

                                 Amplifier circuit                                                                                          Amplifier with Active Balun circuit
                                                           20                                                                                                                                           20
                                                           10
                                                                                                                                                                                S11 S21 S31 [dB]




                                                                                                                                                                                                        10
                                            S11 S21 [dB]




                                                           0
                                                                                                                                                                                                          0
                                                       -10
                                                                                                                                                                                                  -10
                                                       -20
                                                                               S11 S21
                                                                                                                                                                                                  -20                        S11 S21 S31
                                                       -30       Simulation                                                                                                                                    Simulation
                                                                 Measurement                                                                                                                                   Measurement
                                                       -40                                                                                                                                        -30
                                                          1                    5     10            20                                                                                                          1             5    10                           20
                                                                        Frequency [GHz]                                                                                                                               Frequency [GHz]
 Chip size : 1.12 × 1.17 mm Gain and return loss characteristics.                                                             Chip size : 1.92 × 1.17 mm                                                   Gain and return loss characteristics.
                           10                                                                                          0                                                                                        PORT2 PORT3
                            5
                                                                                                                                                                                    Amplitude (a. u.)




                                                                                                                      -5                                                                                1.0
              Pout [dBm]




                            0
                                                                                                         Pout [dBm]




                           -5                                                                                         -10                                                                               0.5
                           -10                                                                                        -15                                                                                 0
                           -15
                                                                                                                      -20                                 PORT2 PORT3
                           -20                                  measurement                                                                Simulation                                                   -0.5
                                                                                                                                           Measurement
                           -25
                                                                simulation                                            -25                  Combination
                                                                                                                                                                                                        -1.0
                           -30                                                                                        -30
                             -40 -35 -30 -25 -20 -15 -10 -5 0                                                           -40 -35 -30 -25 -20 -15 -10
                                           Pin [dBm]                                                                                  Pin [dBm]                                                                 Frequency : 7.0GHz 0.1 nsec/div
           The input-output power characteristics.                                                                     The input-output power characteristics.                                                 Measured voltage waveforms at
                                                                                                                                                                                                               PORT2 and PORT3.

                                                                                                                                                                                                                                               Honjo Lab.

								
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