Explanation of DC/RF Loci for Active Patch Antennas
A characteristic loop locus of dc power versus RF output power was observed as the frequency was varied around the optimum point of an operational active antenna. A new technique was introduced into the simulation, plotting the dependence of parameters such as supply current, efficiency or output power on internal impedance as seen by the naked transistor. It is now clear that the loop was formed as a consequence of the interaction of the transistor packaging elements with the patch impedances.
KeywordsActive antenna power amplifier DC and RF power patch antenna
Unable to display preview. Download preview PDF.
- 2.Ali, N.T., Elkhazmi, E.A., McEwan, N.J.: Experimental and Theoretical Investigation of High Efficiency Active Patch Antennas. In: IEEE International Conferences on Info-tech and Info-net ICII 2001, pp. 433–436 (2001)Google Scholar
- 4.Navarro, J., Chang, K.: Integrated active antennas and spatial power combining. John Wiley&Sons (1996)Google Scholar
- 5.Radisic, V., Qian, Y., Itoh, T.: Class F power amplifier integrated with circular sector microstrip antenna. IEEE MTT-s Dig. 2, 687–690 (1997)Google Scholar