Agilent Technologies 281 A, B service manual Overview, Description

Overview

Description

Agilent 281 adapters provide a convenient means of coupling between waveguide and coaxial systems. Power can be transmitted in either direction, and each adapter covers the full frequency range of its waveguide size with an SWR of less than 1.30. The flanges are lapped to a slight, controlled convexity to assure minimum leakage at the waveguide joint. A probe transforms the waveguide impedance to the 50-ohm impedance of coaxial line. Complete specifications for the adapters are given in Table 1.

Examples of the waveguide flange and coaxial connectors used on these adapters are shown in Figure 1. One type of flange and two types of coaxial connectors are used: Type N female connectors (which are compatible with connectors conforming to MILS-71), are available on all 281A adapters and Amphenol precision 7-mm connectors (available on the 281B adapters). The 7-mm connector features precise alignment, a clearly defined reference plane, and low RF leakage. In addition, any pair can be connected together without an adapter. Option 13 adapters have stainless steel Type N female connectors and are available on the P281B.

Figure 1 Adapters Showing Flange Types and Coaxial Connector Styles

281A/B Adapters Operating and Service Manual 1