A circuit, waveguide, and spatial power combiner for millimeter-wave amplification

A new concept for a millimeter-wave amplifier that uses circuit, waveguide, and spatial power combining is demonstrated. The passive array has a free-space-to-microstrip insertion loss below -1.5 dB from 30 to 44 GHz. Small-signal measurements of the active array reveal an average gain of 5 dB from 41 to 46 GHz and a maximum gain of 6.4 dB at 45.6 GHz. Large-signal measurements reveal a linear power gain of 2 dB and an output power of 23.7 dBm at the 1-dB compression point at 44 GHz.

[1]  R. Collin.  Foundations for microwave engineering , 1966 .

[2]  S. Shanfield,et al.  A high power Q-band GaAs pseudomorphic HEMT monolithic amplifier , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[3]  M.P. De Lisio,et al.  Monolithic 40-GHz 670-mW HBT grid amplifier , 1996, 1996 IEEE MTT-S International Microwave Symposium Digest.

[4]  N. Kolias,et al.  A monopole-probe-based quasi-optical amplifier array , 1997 .

[5]  R. J. Wylde,et al.  Millimetre-wave Gaussian beam-mode optics and corrugated feed horns , 1984 .

[6]  M. A. Gouker,et al.  A 16-element subarray for hybrid-circuit tile-approach spatial power combining , 1996 .

[7]  J. W. Mink,et al.  Quasi-Optical Power Combining of Solid-State Millimeter-Wave Sources , 1986 .

[8]  Z. Popovic,et al.  60 GHz monolithic active antenna array , 1997, IEEE Antennas and Propagation Society International Symposium 1997. Digest.

[9]  Carlos E. Saavedra,et al.  Passive horn structure with transitions to microstrip for quasi-optical amplifier arrays , 1998, Optics & Photonics.

[10]  R. McPhedran,et al.  Bandpass filters: theory and experiment. , 1983, Applied optics.

[11]  V. Varadan,et al.  Free-space measurement of complex permittivity and complex permeability of magnetic materials at microwave frequencies , 1990 .

[12]  Cheng Sun,et al.  Millimeter-Wave Power-Combining Techniques , 1983 .

[13]  Amir Mortazawi,et al.  A two-stage spatial amplifier with hard horn feeds , 1996 .

[14]  K. J. Russell,et al.  Microwave Power Combining Techniques , 1979 .

[15]  R C McPhedran,et al.  Strip gratings at a dielectric interface and application of Babinet's principle: erratum. , 1986, Applied optics.

[16]  Youngwoo Kwon,et al.  A PHEMT based monolithic plane wave amplifier for 42 GHz , 1996, 1996 IEEE MTT-S International Microwave Symposium Digest.

[17]  V. Varadan,et al.  A free-space method for measurement of dielectric constants and loss tangents at microwave frequencies , 1989 .

[18]  Carlos E. Saavedra,et al.  A millimeter-wave quasi-optical amplifier array using inclined-plane horn antennas , 1998 .

[19]  Vijay K. Varadan,et al.  Free-space, broadband measurements of high-temperature, complex dielectric properties at microwave frequencies , 1991 .