Name
Abstract | ||
|---|---|---|
We present a new millimeter-wave power-combining technique using transmission-line baluns which both connect transistor outputs in series and inductively tune the transistor output capacitances. The baluns are much shorter than a quarter-wavelength (λ/4), hence are more compact and have less insertion loss than a λ/4 balun. We introduce one topology providing an even number of series connections, including 2:1 and 4:1, and a second topology providing either an even or odd number of series connections. We then analyze segmented transformer power-combiners as a set of multi-conductor transmission-lines, and explore the relationship between transformer and transmission-line balun power-combiners. We demonstrate the technique with 2:1 and 4:1 series-connected designs implemented in a 0.25 μm InP HBT process. At 86 GHz, a single-stage power amplifier (PA) using the 2:1 baluns exhibits 30.4% peak PAE, 20.37 dBm output power (Pout) and 23 GHz 3-dB bandwidth from a 448 × 816 μm 2 die. A two-stage PA using the 2:1 baluns exhibits 30.2% PAE, and 23.14 dBm Pout from an 824 × 816 μm 2 die. At 81 GHz, a two-stage PA with 4:1 series output power-combining exhibits 23.4% PAE, and 26.7 dBm (470 mW) Pout from a 1,080 × 980 μm 2 die. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/JSSC.2014.2328653 | J. Solid-State Circuits |
Keywords | DocType | Volume |
power combiners,efficiency 30.2 percent,indium compounds,baluns,sub-quarter wavelength,HBT process,mm-wave,segmented transformer power-combiner analysis,transistor output capacitances,transmission-line baluns,sub-quarter-wavelength baluns,frequency 81 GHz,power amplifier,heterojunction bipolar transistors,insertion loss,millimeter-wave series power combining technique,efficiency 23.4 percent,frequency 23 GHz,frequency 86 GHz,two-stage PA,transformer,millimetre wave power amplifiers,transmission line,InP,PA,millimetre wave bipolar transistors,4:1 series-connected designs,power combiner,single-stage power amplifier,Balun,multiconductor transmission lines,multiconductor transmission-lines,2:1 series-connected designs | Journal | 49 |
Issue | ISSN | Citations |
10 | 0018-9200 | 1 |
PageRank | References | Authors |
0.37 | 0 | 6 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Hyun-Chul Park | 1 | 1 | 0.37 |
| Saeid Daneshgar | 2 | 44 | 4.16 |
| Zach Griffith | 3 | 23 | 5.45 |
| M. Urteaga | 4 | 16 | 7.43 |
| Byung Sung Kim | 5 | 45 | 4.90 |
| Mark J. W. Rodwell | 6 | 223 | 29.72 |