Figure 4. Mechanical Layout ot / ypicai Klystron Module Figure o. Sanawich Concept Figure 6. Sandwich Antenna Dipole provide +10 volts (54 required per dipole). A special bank of 8 cells mounted across the end of the cell strips provides the -4 volts. Structure (truss and honeycomb) assembly details are shown with the details of the dipole radiative element. This cross-section is a typical element of the antenna as provided 7.8 cm on center throughout the entire antenna, with each device transmitting approximately 4.2 watts to the ground. The power distribution for the sandwich concept is an integral part of the RF design. A Boeing antenna-mounted power module concept in which low-loss combining is achieved to operate the subarray at approximately 5.5 kV is shown in Figure 7. Experiments have indicated that very low losses result when combining the output of 4 solid-state power amplifiers. A subarray would consist of 20,737 modules, four phase control receivers, one for each 5- bv 5-meter subsection of the
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