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Agilent 11691D/11692D Directional Couplers 2 to 18 GHz
Product Overview
Broadband 20 dB directional couplers
Models 11691D and 11692D high directivity couplers are precision instruments designed for broadband swept reflectometer applications in the 2 to 18 GHz frequency range. With their wide frequency coverage, one of these couplers can replace several couplers without performance degradation, thus adding convenience and economy to swept reflection and transmission coaxial microwave measurements by reducing setup and calibration time. In addition, the broad frequency coverage of the 11691D directional coupler makes it ideal for leveling applications of broadband sources. Its high directivity makes it possible to achieve excellent source matches not achievable with directional detectors.
Specifications
Simultaneous reflection and transmission measurement
These couplers are ideal in reflectometry measurements. The reflection and transmission characteristics of a device can be measured conveniently from 2 to 18 GHz. Figure 1 shows a test configuration in which an 11692D dual coupler and an 11691D single coupler are used to separate and isolate the incident, reflected, and transmitted signals in a sweptfrequency measurement of reflection and transmission. These signals are detected and their ratio displayed on a CRT. The 11691D single coupler compensates in the transmitted signal for the coupling variations "seen" by the reference detector. The compensated ratio (Etran/Eref), being virtually flat, permits highresolution transmission measurements. These couplers are ideal companions for the 8755 frequency response test set, a 0.1 to 18 GHz detection and display system.
Figure 1. Setup for simultaneous swept measurement of insertion loss (A/R) and return loss (B/R), using 11691D and 11692D couplers.
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Frequency range Minimum directivity Maximum primary line SWR Maximum auxiliary port(s) SWR Nominal coupling (dB) Maximum coupling variation with frequency (dB) Tracking auxiliary arms Maximum primary line residual loss Primary line power Handling capability Net weight Dimensions
11691D 2 to 18 GHz 2 to 8 GHz: 30 dB 8 to 18 GHz: 26 dB1 2 to 12.4 GHz: 1.3 12.4 to 18 GHz: 1.40 1.3 20 1 dB * < 2 dB 50 average 250 peak 1.93 kg (4 1b, 4 oz) 404.8 mm (15-15/16 in) L 133.4 mm (5-1/4 in) H 42.9 mm (1-11/16 in)W
11692D 2 to 18 GHz 2 to18 GHz: 30 dB 8 to 18 GHz: 26 dB1 2 to 12.4 GHz: 1.3 12.4 to 18 GHz: 1.40 1.3 20 l dB2 0.7 dB3* < 1.5 dB 50 average 250 peak 2.72 kg (6 1b, 0 oz) 404.8 mm (15-15/16 in) L 133.4 mm (5-1/4 in) H 42.9 mm (1 -11/16 in)W
11691D connector
Option Standard Primary line Input/output APC-7/APC-7 Auxiliary arms N(f)
11692D connector options
Option 11692D-005 11692D-001 11692D-002 11692D-003 11692D-004 Primary line Input/output N(f)/APC-7 N(f)/N(f) N(f)/N(m) N(f)/APC-7 APC-7/APC-7 Auxiliary arms Incident/reflection N(f)/N(f) N(f)/N(f) N(f)/N(f) APC-7/APC-7 APC-7/APC-7
Figure 2. Directivity specifications.
Connectors
The APC-7 and type-N connectors are stainless steel designed for durability. The type-N connectors conform to MIL-C-39012 or MIL-C-71.
Figure 3. Typical coupling curve.
1. 24 dB with type-N connector on the INPUT PORT (11691D) or TEST PORT (11692D). 2. Incident to test port. 3. With the test port shorted and not including source match ripple. * Typical tracking between 11691D and 11692D is 0.07 dB.
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Product specifications and descriptions in this document subject to change without notice. (c) Agilent Technologies, Inc. 2001, 2002 Printed in USA, September 18, 2002 5952-1145
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