@article{RudolphBehtashDoerneretal., author = {Rudolph, Matthias and Behtash, Reza and D{\"o}rner, Ralf and Hirche, Klaus and Wurfl, Joachim and Heinrich, Wolfgang and Tr{\"a}nkle, G{\"u}nther}, title = {Analysis of the Survivability of GaN Low-Noise Amplifiers}, language = {en} } @article{RudolphBehtashHircheetal., author = {Rudolph, Matthias and Behtash, Reza and Hirche, Klaus and W{\"u}rfl, Joachim and Heinrich, Wolfgang and Tr{\"a}nkle, G{\"u}nther}, title = {A Highly Survivable 3-7 GHz GaN Low-Noise Amplifier}, language = {en} } @misc{RudolphDewitzLieroetal., author = {Rudolph, Matthias and Dewitz, Mike and Liero, Armin and Khalil, I. and Chaturvedi, Nidhi and Wipf, Christian and Bertenburg, R. M. and Miller, J. and W{\"u}rfl, Joachim and Heinrich, Wolfgang and Tr{\"a}nkle, G{\"u}nther}, title = {Highly Robust X-Band LNA with Extremely Short Recovery Time}, language = {en} } @inproceedings{RudolphKurpasBrunneretal., author = {Rudolph, Matthias and Kurpas, Paul and Brunner, F. and Doser, W. and Maaßdorf, Andre and D{\"o}rner, Ralf and Blanck, H. and Heinrich, Wolfgang and W{\"u}rfl, Joachim}, title = {Development and Characterization of GaInP/GaAs HBTs for High Voltage Operation}, language = {en} } @inproceedings{LenkKlockenhoffMaassdorfetal., author = {Lenk, Friedrich and Klockenhoff, Harald and Maaßdorf, Andre and W{\"u}rfl, Joachim and Heinrich, Wolfgang}, title = {A 3.2 W coplanar single-device X-band amplifier with GaAs HBT}, series = {Gallium Arsenide and Other Semiconductor Application Symposium, 2005, EGAAS 2005}, booktitle = {Gallium Arsenide and Other Semiconductor Application Symposium, 2005, EGAAS 2005}, publisher = {Horizon House Publ.}, address = {London}, isbn = {88-902012-0-7}, pages = {49 -- 52}, abstract = {High-power GaInP/GaAs HBTs with high breakdown voltage for X-band applications are presented. To demonstrate the capabilities of these devices, a simple monolithic amplifier is realized. For a single 12-finger device with 2/spl times/70 /spl mu/m/sup 2/ emitter finger size, an output power of 3.2 W at 9 GHz with 47\% PAE is achieved.}, language = {en} } @inproceedings{HilsenbeckLenkHeinrichetal., author = {Hilsenbeck, Jochen and Lenk, Friedrich and Heinrich, Wolfgang and W{\"u}rfl, Joachim}, title = {Low phase noise MMIC VCOs for Ka-band applications with improved GaInP/GaAs-HBT technology}, series = {Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 2003, 25th Annual Technical Digest 2003, San Diego, California, November 9 - 12, 2003}, booktitle = {Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 2003, 25th Annual Technical Digest 2003, San Diego, California, November 9 - 12, 2003}, publisher = {IEEE Service Center}, address = {Piscataway, NJ}, isbn = {0-7803-7833-4}, doi = {10.1109/GAAS.2003.1252399}, pages = {223 -- 226}, abstract = {We report on the technology and performance of fully monolithic coplanar voltage-controlled oscillators (VCOs) with GaInP/GaAs-HBTs as the active devices. With our optimized HBT process, the parasitic base resistance R/sub B/ and extrinsic base-collector capacitance C/sub EX/ are significantly reduced. In this way, the maximum frequency of oscillation F/sub max/ is increased from 100 to 170 GHz. This allows us to realize fundamental 38 GHz-VCOs with very low phase noise. At an oscillation frequency F/sub res/=34.2/spl plusmn/0.2 GHz, the VCO reaches phase noise levels of -87 dBc/Hz @ 100 kHz and -108 dBc/Hz @ 1 MHz offset frequency, respectively. To our knowledge, these phase noise values are the lowest GaAs data for Ka-band applications reported so far.}, language = {en} } @inproceedings{KuhnertLenkHilsenbecketal., author = {Kuhnert, Holger and Lenk, Friedrich and Hilsenbeck, Jochen and W{\"u}rfl, Joachim and Heinrich, Wolfgang}, title = {Low phase-noise GaInP/GaAs-HBT MMIC oscillators up to 36 GHz}, series = {2001 IEEE MTT-S International Microwave Symposium digest, May 20 - 25, 2001, Phoenix Civic Plaza, Phoenix, AZ, vol. 3}, booktitle = {2001 IEEE MTT-S International Microwave Symposium digest, May 20 - 25, 2001, Phoenix Civic Plaza, Phoenix, AZ, vol. 3}, publisher = {IEEE Service Center}, address = {Piscataway, NJ}, isbn = {0-7803-6538-0}, doi = {10.1109/MWSYM.2001.967198}, pages = {1551 -- 1554}, abstract = {Monolithic coplanar 18 and 36 GHz oscillators with GaInP/GaAs-HBTs and on-chip resonators are presented. Measured phase-noise reaches -93 dBc/Hz and -91 dBc/Hz at 100 kHz offset for 18 and 36 GHz, respectively. These values demonstrate that GaAs-HBT oscillators yield a phase-noise performance comparable to SiGe-HBTs, with the potential for higher frequencies.}, language = {en} } @inproceedings{SchottKuhnertLenketal., author = {Schott, Matthias and Kuhnert, Holger and Lenk, Friedrich and Hilsenbeck, Jochen and W{\"u}rfl, Joachim and Heinrich, Wolfgang}, title = {38 GHz push-push GaAs-HBT MMIC oscillator}, series = {2002 IEEE MTT-S International Microwave Symposium digest, June 2 - 7, 2002, Washington State Convention \& Trade Center, Seattle, Washington, vol. 2}, booktitle = {2002 IEEE MTT-S International Microwave Symposium digest, June 2 - 7, 2002, Washington State Convention \& Trade Center, Seattle, Washington, vol. 2}, publisher = {IEEE Service Center}, address = {Piscataway, NJ}, isbn = {0-7803-7239-5}, doi = {10.1109/MWSYM.2002.1011761}, pages = {839 -- 842}, abstract = {Two differential coplanar MMIC HBT oscillators are presented, a fixed frequency and a VCO version. They provide single-ended output at the second harmonic at 38 GHz as well as differential output at 19 GHz. The oscillators show excellent phase noise performance, the fixed-frequency type reaches -95 dBc/Hz at the fundamental frequency and -89 dBc/Hz at the second harmonic, at 100 kHz offset.}, language = {en} } @inproceedings{LenkSchottHilsenbecketal., author = {Lenk, Friedrich and Schott, Matthias and Hilsenbeck, Jochen and W{\"u}rfl, Joachim and Heinrich, Wolfgang}, title = {Low phase-noise monolithic GaInP/GaAs-HBT VCO for 77 GHz}, series = {2003 IEEE MTT-S International Microwave Symposium digest, June 8 - 13, 2003, Pennsylvania Convention Center, Philadelphia, Pennsylvania, vol. 2}, booktitle = {2003 IEEE MTT-S International Microwave Symposium digest, June 8 - 13, 2003, Pennsylvania Convention Center, Philadelphia, Pennsylvania, vol. 2}, publisher = {IEEE Service Center}, address = {Piscataway, NJ}, isbn = {0-7803-7695-1}, doi = {10.1109/MWSYM.2003.1212515}, pages = {903 -- 906}, abstract = {Coplanar W-band push-push VCO MMICs using GaInP/GaAs HBTs are presented. One circuit operates at 77 GHz with phase noise of -92 dBc/Hz at 1 MHz offset. To our knowledge this is the first fully monolithic W-band VCO with phase noise better than -90 dBc/Hz. A second version with two varactor diodes yields an almost threefold relative tuning bandwidth.}, language = {en} } @misc{YazdaniBeleniotisBrunneretal., author = {Yazdani, Hossein and Beleniotis, Petros and Brunner, Frank and Ostermay, Ina and W{\"u}rfl, Joachim and Rudolph, Matthias and Heinrich, Wolfgang and Hilt, Oliver}, title = {K/Ka-Band-GaN-High-Electron-Mobility Transistors Technology with 700 mS mm-1 Extrinsic Transconductance}, series = {Physica Status Solidi}, journal = {Physica Status Solidi}, doi = {10.1002/pssa.202400592}, pages = {8}, language = {en} }