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Agilent Coaxial Detectors


Agilent Technologies broadband detectors span frequencies from 100kHz to 50GHz. These detectors are widely used on the design and production test bench, as well as for internal components of test system signal interface units. They find use in a variety of test and measurement applications:

Power monitoring
Source leveling
Video detection
Swept transmission and reflection measurements

Agilent detectors are available in two families – Silicon Low Barrier Schottky Diode (LBSD) and Gallium Arsenide Planar Doped Barrier Diode (GaAs PDBD) detectors. The Gallium Arsenide detector technology produces diodes with extremely flat frequency response to 50GHz. Also, the GaAs PDBD detector has a wider operating temperature range (–65 °C to +100 °C), and is less sensitive to temperature changes.

Planar-Doped Barrier Detectors

Agilent 8471D 8471E coaxial detectors are planar-doped barrier detectors offering excellent performance to 2 and 12GHz. The Agilent 8471D covers 100kHz to 2GHz with a BNC male input connector and the Agilent 8471E covers 10MHz to 12GHz with a SMA male input connector. Both detectors come standard with negative polarity output, a positive polarity output is available as Option 103.

High Performance Planar-Doped Barrier Detectors

Agilent 8474B, 8474C and 8474E detectors are the newest additions to the Agilent family of high performance detectors. Utilizing a gallium arsenide, planar-doped barrier detecting diode, these detectors offer superior performance when compared to Schottky diodes. These coax detectors feature extremely flat frequency response (typically better than ±1 dB to 50GHz) and very stable frequency response versus temperature. These detectors are available with Type-N, 3.5mm, or 2.4mm connectors. They are also offered with an option for positive output polarity (Option 103). Additionally, some detectors have an optimal square law load available (Option 102). For applications requiring an octave band or less, Agilent 8474B, 8474C and 8474E detectors are available with frequency band options that feature lower SWR and flatter frequency response.

Low-barrier Schottky Diode Detectors

Agilent 423B, 8470B, 8472B, 8473B, 8473C, 33330B and 33330C Low-barrier Schottky Diode Detectors have been widely used for many years in a variety of applications including leveling and power sensing. They offer good performance and ruggedness. Matched pairs (Option 001) offer very good detector tracking. A square law load option (Option 002) extends the square law region to at least 0.1mW (–10 dBm).

Agilent 83036C broadband directional detector

The Agilent 83036C broadband microwave power sampler operates in much the same way as a directional coupler and detector combination. Comprised of a resistive bridge and PDB diode, this broadband device offers excellent frequency, temperature, and square law response characteristics.

With a 10MHz to 26.5GHz frequency range, a single Agilent 83036C can be used in many applications where two directional couplers and detectors were once required.

The maximum SWR is 1.7 above 50MHz on both the input and output ports. Directivity of 14dB matches that of most miniature couplers currently available. The maximum insertion loss is 2.2dB.

The Agilent 83036C detector has been used with great success as the sampling element for external leveling of broadband swept frequency sources. The detector’s extended frequency range increases the usable band to 100MHz to 26GHz, giving the user full use of a broadband source with external leveling. Other uses include the internal leveling element for sources, and forward/reverse power monitoring.

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