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| Digital Radio Transmitter Modules for 21.2 to 23.6 GHz Technical Data DRT1-23XX Features * Integrated Microwave/ Millimeter-Wave Modules * Low Phase Noise * Silicon Bipolar VCO * Full Band Tuning * GaAs MMIC Output Stage * Sample Output for Phase Locking * Excellent Tuning Linearity * 30 dB Attenuator * Waveguide/SMA RF Output * Detected Output Description This digital radio transmitter module is designed for medium data rate point to point communication systems operating at 23 GHz. This module offers excellent phase noise performance and can be easily phase locked to a frequency reference. The transmitter module provides +20 dBm of output power, ideal for use in radios using 2 and 4 level FSK modulation. The module features an ultra low noise silicon bipolar VCO operating in the S/C band. A portion of the oscillator output is coupled off and is applied to a frequency divider network. The low frequency output (less than 1 GHz) from the frequency divider can be easily used to phase lock the source. The main oscillator output is applied to a frequency multiplier network to produce the desired output frequency in the 23 GHz range. The output of this network is filtered then amplified by a GaAs MMIC device to produce the required output power. A detected sample of the output signal is provided to facilitate built in test of key radio components. Applications This digital radio module supplies the transmitter function in radios operating in the 21.2 to 23.6 GHz band. The source provides close to 100 mW output power over the temperature range of -30C to +70C. Included within the transmitter module is a muting function to reduce output power by 50 dB for "hot standby" applications. An internal voltage controlled attenuator function is optional allowing for 30 dB dynamic range adjustment. Block Diagrams Transmitter Module Without Attenuator Modulation Input Tuning Voltage LO Signal Sample Output X4 BPF MMIC AMP X2 BPF MMIC AMP RF Out 21.2 to 23.6 GHz +4 Mute Detector Transmitter Module With Attenuator Modulation Input Tuning Voltage LO Signal Sample Output X4 BPF MMIC AMP X2 BPF MMIC AMP Attenuator RF Out 21.2 to 23.6 GHz MMIC AMP Attenuator Control +4 Mute Detector 5965-5090E 8-12 DRT1-23XX Absolute Maximum Ratings (TA = -30 to +70C) Parameters DC Circuit Power +10 +5.0 -5.0 Power Control Tuning Voltage Units Volts Volts Volts Volts Volts Ratings 11 +5.5 -4.5 5 17 Notes: 1. Operation in excess of any one of these parameters may result in permanent damage. 2. A thermal interface medium must be used between the bottom of the package and its mating surface to ensure optimum heat transfer. Electrical Characteristics Part Number Parameters RF Tuning Range Operating Temperature Range Storage Temperature Range RF Power Output Sample Out Frequency Sample Out Power Detected Out Harmonics and Sub-Harmonics from 2.65 to 55 GHz from carrier [1] Spurious Output from 2.65 - 55 GHz [1] @ fo 1.0 GHz @ fo sample out frequency Phase Noise @ 100 KHz Tuning Voltage Input Capacitance, Nom Main Tuning Sensitivity Main Tuning Sensitivity Variation Modulation Bandwidth Modulation Sensitivity Modulation Sensitivity Variation over any 300 MHz DC Circuit Power +10 Volts +5 Volts -5 Volts Frequency Pushing on +10V Line based on 0.2V variation Return Loss @ Full Power Output [2] Mute Control Mute Control Range RF Connector Attenuator Range Attenuator Control Voltage RF Output Dynamic Range Humidity Non Condensing Condensing Case Size Notes: 1. 2. Tested only to 50 GHz Module is unconditionally stable with this load VSWR of 2.0:1 Units GHz C C dBm MHz dBm V dBc DRT1-2321 or DRT1-2322 Min. Typ. Max. 21.2 -30 -45 19 663 -10 0.4 23.6 70 85 20 738 0 2 -30 DRT1-2311 or DRT1-2312 Min. Typ. Max. 21.2 -30 -45 19 663 -10 0.4 23.6 70 85 20 738 0 2 -30 dBc dBc dBc dBc V pf MHz/V MHz MHz/V -85 1 27 260 1.5:1 20 7 1.15:1 -30 -50 -40 -82 16 335 2.0:1 25 -85 1 27 260 1.5:1 20 7 1.15:1 -30 -50 -40 -82 16 335 2.0:1 25 mA mA mA MHz/V dB dBc V dB V % % inches 40 10 -50 0 WR 42 or Coax 30 0 30 Min. 85 95 3.50 x 1.25 x 0.40 175 975 50 50 40 10 -50 175 600 50 50 5 0 WR 42 or Coax NA NA NA 85 95 3.50 x 1.25 x 0.40 5 5 8-13 DRT1-23XX Typical Performance 25 24 MODULATION SENSITIVITY 300 23 P OUT (dBm) 23 200 TUNING VOLTAGE 22 150 21 19 Spec Min 17 T = +25C T = -30C T = +70C 22 23 24 15 21 21 2 4 6 8 10 12 14 100 16 FREQUENCY (GHz) TUNING VOLTAGE (V) Figure 1. Power Out vs. Frequency. Figure 2. Tuning Voltage vs. Frequency and Modulation Sensitivity. -40 0 -60 ATTENUATION (dB) -10 -20 dBc (Hz) -80 -100 -30 -120 -40 0 1 2 3 4 5 ATTENUATOR VOLTAGE -140 1 10 100 1000 KHz Offset from Carrier Figure 3. Dynamic Range Adjust. Figure 4. Phase Noise at 23 GHz vs. KHz Offset from Carrier. MAIN TUNING (MHz/V) FREQUENCY (GHz) 250 Powering Up Instructions The -5 volts must be applied to the receiver module before applying the +5 volts. Likewise when shutting down the receiver module the +5 volts must be removed before the -5 volts is turned off. The +10 volts can be turned on in any sequence. Failure to follow this procedure could cause permanent damage to the module. Mounting Instructions Case must be mounted firmly, with screws, to an adequate metallic structure that has sufficient thermal properties to maintain the module case at a temperature not to exceed 70C. Product Options Specify part number followed by option. For example: DR T 1 - 23 X X Model Number Prefix = Digital Radio T = Transmitter Module Internal Use 1 = SMA Connector 2 = WR-42 Waveguide Connector 1 = No Attenuator 2 = Attenuator Option 23 = 21.2 to 23.6 GHz Frequency Band 8-14 Case Dimensions H DRTI-23XX S/N XXXX 1.25 GND MOD TUNE +5V DIV GND DIV OUT +10V +5V PA -5V DET ATTEN GND 12x .20 3.50 .40 REF 1.89 .65 10x .100 .40 MAX 12x .22 12x O .025 SEE DETAIL A .125 6x O .120 THRU .670 .170 .445 .500 .420 .250 .500 .445 .500 2.430 .335 .375 2.70 .120 .700 DETAIL A 8-15 |
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