A planar microwave imaging system with step-frequency synthesized pulse using different calibration methods
✍ Scribed by Marek E. Bialkowski; Wee Chang Khor; Stuart Crozier
- Book ID
- 102515521
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 439 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
Ϫ48.3 and Ϫ40.94 dB, respectively. The RF input return loss shown in Figure 6 is better than 25 dB in the 5.725-5.825-GHz received band, which clearly shows the 50⍀ characteristic during application. Plotted in Figure 7 are the measured results of the intermodulation products in a two-tone test, showing IIP3 of Ϫ9.5 dBm. Figure 8(a) shows the corresponding double-sided band NF and conversion gain revealed for the 5.8-GHz-band operation are 4.15 and 34.61 dB, respectively, under Ϫ4 dBm of LO conversion gain. NF with wide IF-frequency is shown in Figure 8(b).
4. CONCLUSION
A new on-chip balun has been designed and successfully applied to the subcircuit design of a receiver. Wide bandwidth with small amplitude error is obtained due to the use of a fully symmetric layout and the same common virtual ground. Further, this paper has also shown how to merge a single-ended LNA and doublebalanced mixer with the on-chip balun in order to realize remarkable performance with low-power dissipation. This balun will be quite useful for applications in wireless communication systems.