26–33 GHz GaAs MMIC Image Rejection Balanced Mixer AM028R1-00 Features Chip Outline ■ Low Conversion Loss, 8 dB 2.155 ■ Insensitive to LO Power Variations OHMIC ADDED 9-4-92 ■ Image Rejection, 20 dB ■ No DC Bias Required 1.061 OHMIC ADDED 9-4-92 ■ Requires External IF 90° Hybrid 1.563 1.060 Description 0.610 SMHO 05 0.085 2.320 2.008 1.270 1.119 0.381 0.000 0.000 Alpha’s image rejection balanced GaAs Schottky diode mixer has a typical conversion loss of 8 dB at an LO power level as low as 11 dBm over the band 26–33 GHz. An external 90° IF hybrid is required to combine the IF1 and IF2 signals at the desired IF frequency. The chip uses Alpha’s proven Schottky diode technology, and is based upon MBE layers for the highest uniformity and repeatability. The diodes employ surface passivation to ensure a rugged, reliable part with through-substrate via holes and gold-based backside metallization to facilitate an epoxy die attach process. All chips are screened for DC diode parameters and lot samples are RF measured to guarantee performance. This device is recommended for applications requiring down conversion. Dimensions indicated in mm. All pads are ≥ 0.07 mm wide. Chip thickness = 0.1 mm. Absolute Maximum Ratings Characteristic Value Operating Temperature -55°C to +125°C Storage Temperature -65°C to +150°C Total Input Power (RF + LO) 23 dBm Electrical Specifications at 25°C Parameter Symbol RF and LO Frequency Range Min. Typ.2 Max. Unit FRF, FLO 26–33 GHz IF Frequency Range FIF 0–3 GHz LO Power Level dBm PLO 11–19 Conversion Loss1 LC 8 dB Image Rejection1 IR 20 dB RLRF, RLLO ISOLO-RF 17 dB 18 dB ISOLO-IF 30 dB RF Input 1 dB Compression Point1 P1 dB 12 dBm Individual Diode Series Resistance RS RF and LO Return Loss1 LO to RF Isolation1 LO to IF Isolation1 3.0 Ω 1. Not measured on a 100% basis. 2. Typical represents the median parameter value across the specified frequency range for the median chip. Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 2/00A 1 26–33 GHz GaAs MMIC Image Rejection Balanced Mixer AM028R1-00 Typical Performance Data 50 Conversion Loss (dB) 40 12 30 LO to RF Isolation 20 10 LO Return Loss 10 8 Conversion Loss LO to IF Isolation 7 9 11 13 15 17 14 40 12 LO to RF Isolation 10 LO Return Loss 8 10 Conversion Loss 0 25 19 26 27 LO Power (dBm) 28 29 30 31 32 33 34 LO Frequency (GHz) Performance vs. LO Power FRF = 30.3 GHz, FLO = 28 GHz, PRF = -10 dBm Performance vs. LO Frequency FRF = FLO + 2 GHz, PLO = 12 dBm 25 Image Rejection (dB) 25 Image Rejection (dB) 30 20 6 0 6 50 Return Loss & Isolation (dB) 14 16 Return Loss & Isolation (dB) LO to IF Isolation Conversion Loss (dB) 16 20 15 10 5 20 15 10 5 0 0 7 9 11 13 15 17 25 19 LO Power (dBm) 26 27 28 29 30 31 32 33 34 LO Frequency (GHz) Image Rejection vs. LO Power FRF = 30.3 GHz, FLO = 28 GHz, PRF = -10 dBm Image Frequency = 25.7 GHz Wire Bonding Configuration Image Rejection vs. LO Frequency FRF = FLO + 2 GHz, PLO = 12 dBm Image Frequency = FLO - 2 GHz Circuit Schematic 90˚ Phase Shifter/Splitter OHMIC ADDED 9-4-92 0˚ Splitter OHMIC ADDED 9-4-92 RF LO LO IF1 RF IF2 SMHO 05 IF1 IF2 IF ports bonded to IF hybrid. 2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com Specifications subject to change without notice. 2/00A