be RB ot, Avantek Products Kir HEWLETT PACKARD Microwave Wideband GaAs FET Gain Control Amplifiers Selection Guide Features * 2 to 18 GHz Frequency Coverage 10 and 20 dB of Gain Control Small Signal Gain of 25 and 45 dB * 0-10 Volts @ <10 mA typical Applications Automatic Gain Control * Microwave Transceivers Commercial and Military AVGC3-B2Z52E Description Both the AGT 823x series and the AGT 1863x series provide a continuously variable gain control over two key wideband frequency ranges, providing the system designer with increased dynamic range and the ability to set signal levels. The AGT series uses dual-gate GaAs FET variable gain modules that respond rapidly (less than 10 ms) to 0 to +10 VDC control voltage inputs. Control current drain is low (typically less that 10 mA) simplifying control driver requirements. The variable gain contro] modules are combined with HPs high performance GaAs FET fixed-gain modules to pro- vide both low noise figure and medium power output over the entire mulli-octave frequency bands. 4-41 AGT Series Case Types 1C_, X_ (See Section 5 for detailed case drawings.) Temperature Compensa- tion using the Gain Control The gain control provided in both AGT series may be used to provide temperature compensa- tion for gain variation within the amplifier. The user can determine the actual gain change over temperature exhibited by the amplifier and/or other system elements. The amplifier should then be set up to provide a zero gain reduction at the high tem- perature, and the gain control voltage then linearly increased to provide the appropriate gain.Product Options Model Number Prefix AGT - 18634X AGT- . . Screening Option Blank = No Screening R = R-Series Screening For more information on R-Series screening, Model Number ~ see Reliability Screening, Section 6. Contact your nearest HP sales office and/or distributor for assistance in ordering these products. AGT Series Guaranteed Specifications @ 25C Case Temperature Power Output for 1dB Gain Typical Noise Figure Compression Third-Order Small Signal MAX Maximum Minimum Intercept Input Frequency |Gain Minimum | Gain @NO @ MAX | withNO @MAX Gain Point VSWR Power? Response with NO Control | Gain Gain Gain Gain Flatness | ABOVE 1 dB | (50 ohms)! Typical Minimum | Gain Control | Range! | Control Control | Control Control | Maximum | Compression | Maximum | Current] Case Model (GHz) (4B) (4B) | (dB) (4B) | (dBm) (4Bm) (+dB) (dBm) | In Out] (mA) | Type AGT-8233 28 25 10 5.5 7.0 +15 +12 2.0 8.0 2.0 2.0 300 | ICIG AGT-8235 28 45 20 55 7.0 +15 +12 3.0 8.0 2.0 2.0 500 | IC6G AGT-18634 6-18 25 10 6.0 7.0 +5 +10 2.0 8.0 2.0 2.0 300) | IX4G AGT-18637| 6-18 45 20 6.0 8.0 +15 +12 3.5 8.0 20 20] 500 | IX8G Notes: 1. Gain control voltage: 0 to +10 VDC maximum. No gain control for 0 VDC. Increasing gain control voltage decreases amplifier gain. Maxi- mum gain control (minimum gain) at +10 VDC Maximum. Gain control current: 10 dB control range <5 mA typical. 20 dB control range <10 mA typical. 2. Contains integral voltage regulator permitting operation from unregulated +12 to +15 VDC power supply. Specified current is typical at +12 VDC. 3. For description of all available product options, refer to Product Options at beginning of this subsection. 4-42Performance Curves Typical Performance @ 25C Case Temperature AGT-18637 GAIN vs. FREQUENCY AND GAIN CONTROL 55 , ! i . 50 i + eb awe 45 40 . : : AE: 0 ~ + 35 > - ote WAY = o 9 | 25 4 oA GAIN CONTROL : VOLT 20 OLTAGE . . | | | 15 . : . i 5 7 9 1 13 15 17 19 Frequency, GHz AGT-8235 GAIN vs. FREQUENCY 55 AND GAIN CONTROL | : | 0.0 50 1.0 | y 2.0 45 3.0 | LY 4.0 7 @ 5.0 ec ONY _ 60 Ks 7.0 35 Yo 80 ~~ 9.0 __| 30 10.0 25 GAIN CONTROL | VOLTAGE | 20 fee a ee 1.0 2.0 4.0 6.0 80 9.0 Frequency, GHz 4-43