High-efficiency push-pull power amplifier integrated with quasi-Yagi antenna
| Autor: | C.Y. Hang, Tatsuo Itoh, Yongxi Qian, William R. Deal |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Engineering
Radiation business.industry Amplifier Antenna aperture RF power amplifier Electrical engineering Power bandwidth Power factor Condensed Matter Physics Antenna efficiency Electronic engineering Power dividers and directional couplers Electrical and Electronic Engineering business Ground plane |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 49:1155-1161 |
| ISSN: | 0018-9480 |
| Popis: | This paper presents a C-band push-pull power amplifier integrated with a modified uniplanar quasi-Yagi antenna. In this circuit, corrugation is added to the truncated ground plane of the antenna so that it can be used for both out-of-phase power combining and second harmonic tuning. By using the active integrated antenna concept, this novel circuit eliminates the usage of an ordinary 180/spl deg/ hybrid at the power-amplifier output stage, therefore eliminating the losses associated with the hybrid, resulting in a compact and high-efficiency power-amplifier design with intrinsic second harmonic suppression. At an operating frequency of 4.15 GHz, a maximum measured power-added efficiency (PAE) of 60.9% at an output power of 28.2 dBm has been achieved. The measured PAE is above 50% over a 260-MHz bandwidth. Additionally, the second harmonic radiation is found to be 30 dB below the fundamental in both E- and H-planes. When the circuit is subjected to a two-tone test, the measured third-order intercept point is 37 dBm, about 10 dB above the P/sub 1 dB/ point. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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