Isolation type tube mounting supports will, however, eliminate vibration effects. The coaxial circuit has an inherent thermal impedance situation which imposes duty factor limits and high average power levels. More vanes can be added to reduce tip temperatures. High dissipation values, however, are limited by the restricted heat transfer mechanism between the anode resonator and the external heat sink. The rising sun circuit derives its name from the appearance of its resonator cross section.
Resonators are alternatively large and small with a common inner diameter.
The geometry results from the electrical design, which is a closely coupled dual resonant system. Every other resonator is resonant to F1, while the interposing resonators are resonant to F2. Because the resonators are closely coupled, a single P1 mode F3 frequency becomes outstanding, with the competing modes becoming widely separate. Mechanically it can be thought of as an extension of the vane and strap circuit. As the frequency of the magnetron increases, the geometry becomes smaller and the straps more difficult to fabricate.