Passive FET MMIC linearizers for C, X and Ku-band satellite-applications

Katz, A.; Moochalla, S.; Klatskin, J.

doi:10.1109/mcs.1993.247455

Cited by 17 publications

(9 citation statements)

References 4 publications

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“…The Astro MMIC linearizers employ a single GaAs MESFET with zero source-drain bias as the non-linear element [4,5]. These MMIC linearizers achieve wider bandwidth and lower insertion loss without sacrificing any other performance characteristics.…”

Section: Mmic Linearizermentioning

confidence: 99%

Application of MMICs in communication satellites

Moochalla¹,

Katz²,

Zygmaniak³

et al. 1994

15th International Communicatons Satellite Systems Conference and Exhibit

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MMICs are being widely used in flight applications at Astro Space. Proper selection of MMIC technology, commonality of MMICs in various boxes, development of generic boxes, and development of strategic relationships with vendors has resulted in cost savings due to weight and materiauabor reductions. MESFET and P H E W technology has primarily been used for attenuators, linearizers, limiters and amplifiers, covering 600 MHz (3.6 GHz to 4.2 GHz) at C-Band and 1.8 GHz (10.95 GHz to 12.75 GHz) at Ku-Band, up to medium power (+23 dBm) level.

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Section: Mmic Linearizermentioning

confidence: 99%

Application of MMICs in communication satellites

Moochalla¹,

Katz²,

Zygmaniak³

et al. 1994

15th International Communicatons Satellite Systems Conference and Exhibit

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show abstract

“…It has the advantages of smaller size, less complexity, and lower cost than other linearization techniques [6], [7]. Various predistortion linearizers, such as the diode linearizer [8], [9], the passive field-effect transistor (FET) [10]- [12], and the base-emitter diode of the heterojunction bipolar transistor (HBT) [13] have been applied to microwave applications below 20 GHz. However, these linearizers [9], [10] usually cause high insertion losses of 6-11 dB, which means we need to add an extra buffer amplifier to compensate for the power-gain loss in microwave frequencies.…”

Section: Introductionmentioning

confidence: 99%

“…Various predistortion linearizers, such as the diode linearizer [8], [9], the passive field-effect transistor (FET) [10]- [12], and the base-emitter diode of the heterojunction bipolar transistor (HBT) [13] have been applied to microwave applications below 20 GHz. However, these linearizers [9], [10] usually cause high insertion losses of 6-11 dB, which means we need to add an extra buffer amplifier to compensate for the power-gain loss in microwave frequencies. In addition, when these linearizers [8]- [12] are integrated with MMIC PAs, they required separate bias circuits which increase the die area.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of a 44-GHz MMIC low-loss built-in linearizer for high-linearity medium power amplifiers

Tsai

Chang

et al. 2006

IEEE Trans. Microwave Theory Techn.

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A 44-GHz monolithic microwave integrated circuit (MMIC) low-loss built-in linearizer using a shunt cold-mode high-electron mobility transistor (HEMT), based on the predistortion techniques, is presented in this paper. The proposed cold-mode HEMT linearizer can enhance the linearity of the power amplifier (PA) with a low insertion loss (IL 2 dB), a compact die-size, and no additional dc power consumption. These advantages make the linearizer more suitable for millimeter-wave (MMW) applications. The physical mechanism of the gain expansion characteristics of the proposed linearizer is analyzed. A systematic design procedure for a low-loss linearizer is developed, which includes: 1) insertion loss minimization through a device-size selection and 2) linearity optimization through a two-tone test. To demonstrate the general usefulness of the proposed linearizer, the linearizer was applied to a two-stage 44-GHz MMIC medium PA and a commercial MMW PA module. After linearization, the output spectrum regrowth is suppressed by 7-9 dB. To keep the adjacent channel power ratio below 40 dBc, the output power has been doubled from 15 to 18 dBm at 44 GHz. The error vector magnitude of the 16-quadrature amplitude modulation signal can be reduced from 6.11% to 3.87% after linearization. To the best of our knowledge, this is the first multistage MMW PA with a low-loss built-in linearizer.Index Terms-Linearizer, millimeter-wave (MMW), monolithic microwave integrated circuit (MMIC), nonlinear, power amplifier (PA).

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“…Various pre-distortion linearizers, such as diode linearizer and passive FET, have been applied to microwave applications under 20 GHz in [4]- [6]. Nevertheless, these linearizers [5], [6] usually cause high insertion losses, 6-11 dB, which means, we need to add an extra buffer amplifier to compensate the power gain loss in microwave frequencies.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, these linearizers [5], [6] usually cause high insertion losses, 6-11 dB, which means, we need to add an extra buffer amplifier to compensate the power gain loss in microwave frequencies.…”

Section: Introductionmentioning

confidence: 99%

A 44-GHz high-linearity MMIC medium power amplifier with a low-loss built-in linearizer

Tsai

Chang

et al. 2005

IEEE MTT-S International Microwave Symposium Digest, 2005.

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This paper presents a 44-GHz MMIC medium power amplifier with a low-loss built-in linearizer using a 0.15µm GaAs HEMT process. The proposed cold-mode HEMT linearizer can enhance the linearity of the power amplifier with a low insertion loss, a compact die-size, and zero dc consumption. These advantages make the linearizer more suitable for millimeter-wave applications. The experimental results show that the medium power amplifier output spectrum re-growth can be suppressed by 7-9 dB at 44 GHz. In addition, the EVM of the QPSK and 16-QAM modulated signal can be reduced from 4.5% to 3.7% and 10.8% to 7.4% respectively. To the best of our knowledge, this is the first attempt of using pre-distortion linearization techniques in millimeter-wave bands.Index Terms -Linearizer, millimeter-wave (MMW), monolithic microwave integrated circuit (MMIC), nonlinear, power amplifier (PA).

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Passive FET MMIC linearizers for C, X and Ku-band satellite-applications

Cited by 17 publications

References 4 publications

Application of MMICs in communication satellites

Application of MMICs in communication satellites

Design and analysis of a 44-GHz MMIC low-loss built-in linearizer for high-linearity medium power amplifiers

A 44-GHz high-linearity MMIC medium power amplifier with a low-loss built-in linearizer

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