One GHz class E RF power amplifier for a polar transmitter

Hietakangas, Simo; Rautio, Timo; Rahkonen, Timo

doi:10.1007/s10470-007-9109-x

Cited by 7 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Advantages of inverse class E over classical realization are that the drain peak voltages are lower than in classical class E and the inductance values in the output circuitry are smaller, which can save area in a MMIC chip implementation and can usually give smaller electrical series resistance (ESR) [4]. Also, the possibility to accommondate series inductance as a part of resonating circuitry is useful, since the parasitic reactances can cause undamped resonances to drain waveforms [6,7]. These advantages were the reasons for choosing inverse class E topology as a starting point for our investigation.…”

Section: Class E and Inverse Class E Amplifiersmentioning

confidence: 99%

Design of integrated 1.6 GHz, 2 W tuned RF power amplifier

Hietakangas

Typpö

Rahkonen

2010

Analog Integr Circ Sig Process

Self Cite

View full text Add to dashboard Cite

This paper describes the design of an integrated tuned power amplifier specified to operate at Inmarsat satellite uplink frequencies from 1626.5 to 1660.5 MHz. The basic topology of the amplifier lies on the parallel tuned inverse class E amplifier that is modified by placing the DC-blocking capacitor into a new position and by adjusting the size of the capacitor to improve stability below the desired band. Further, the new positioning reduces losses between drain and load. The high currents flowing in the circuit made it necessary to use wide inductor width and high-Q finger capacitors in the on-chip resonator. The amplifier was implemented as a Gallium Arsenide (GaAs) integrated circuit (IC) that delivered 2 W of output power while the drain efficiency was ca. 56%. Measurements included source and load pulls to further improve the performance of the amplifier and to investigate the stability at small input drive levels.

show abstract

Section: Class E and Inverse Class E Amplifiersmentioning

confidence: 99%

Design of integrated 1.6 GHz, 2 W tuned RF power amplifier

Hietakangas

Typpö

Rahkonen

2010

Analog Integr Circ Sig Process

Self Cite

View full text Add to dashboard Cite

show abstract

“…In advanced transmitting methods using different techniques, such as Envelope Elimination and Restoration (EER) or Polar transmitters [2][3][4][5], delta-sigma based transmitters [6][7][8][9][10] and Linear amplification with Nonlinear Components (LINC) [11,12], the envelope-varying signal is converted to a signal with a constant envelope. Consequently, it is possible to use highly efficient saturated linear amplifiers or switching-mode power amplifiers (SMPAs) such as classes D, E or F [13].…”

Section: Introductionmentioning

confidence: 99%

Time-Interleaved Delta-Sigma Modulator for Wideband Digital GHZ Transmitters Design and SDR Applications

Ebrahimi¹,

Helaoui²,

Ghannouchi³

2011

PIER B

View full text Add to dashboard Cite

Abstract-This paper presents a development of a wideband deltasigma modulator for fully digital GHz transmitters. The fully digital RF transmitter is developed as a promising solution for software defined radio (SDR) terminals and applications. The fully digital transmitter consists of a delta-sigma modulator, a highspeed multiplexer and a switching-mode power amplifier. The speed limitation of delta-sigma modulator is the main limitation to increase the signal bandwidth in fully digital transmitters. In this paper, the bandwidth of the fully digital transmitter is increased 8 times using parallel processing time-interleaved architecture, while maintaining the same signal quality. This architecture was implemented on FPGA and tested for different standards (WiMAX and LTE) with a signal bandwidth up to 8 MHz. The concept was assessed in terms of SNDR by using a differential logic analyzer at the output of FPGA, and the SNDR was found to be around 60 dB.

show abstract

“…Generally, the RF transmitter part includes digital-to-analog converters, a frequency up-conversion stage, and a power amplifier (PA) [3]. In practice, the input signal of the PA usually has a varying envelope, and to avoid distortion, advanced transmitting methods using different techniques, such as Envelope Elimination and Restoration (EER) or Polar transmitters [4]- [5], linear amplification with Nonlinear Components (LINC) [6]- [7], and sigma-delta based transmitters [8]- [9]- [10]. As a result; the envelope-varying signal is converted to a signal with a constant envelope.…”

mentioning

confidence: 99%

Sigma Delta Modulator Based Multi-Standard Transmitter Design For Wireless Communication Applications

Mohammed¹,

Hussein

Salama³

et al. 2016

The International Conference on Electrical Engineering

View full text Add to dashboard Cite

This paper presents a sigma delta modulator (ƩΔM) based transmitter that is suitable for digital multi-standard wireless applications especially for software defined radio (SDR) systems. The proposed transmitter mainly consists of a sigma-delta modulator and a switching-mode power amplifier. In the proposed design, a third order low-pass ƩΔM is implemented to produce a high frequency digital-like signals that is used to drive a high efficient class-E switching mode power amplifier. The target technology for fabrication is TSMC180nm CMOS process. The proposed design is tested for different standards such as Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), Wi-Fi and Long Term Evolution (LTE) with frequency bands of (1.8GHz, 2.1GHz, 2.4GHz, (1.9, 2.6GHz)) respectively. The class-E power amplifier has shown peak power added efficiency (PAE) and peak output power of 62/58.7/60/52/47% and 27.7/27.5/27.6/27/26.7dBm, respectively, at the mentioned standards. Moreover, the proposed power amplifier can cover a wide range of frequency from 1.8GHz to 2.6GHz maintaining high efficiency.

show abstract

One GHz class E RF power amplifier for a polar transmitter

Cited by 7 publications

References 10 publications

Design of integrated 1.6 GHz, 2 W tuned RF power amplifier

Design of integrated 1.6 GHz, 2 W tuned RF power amplifier

Time-Interleaved Delta-Sigma Modulator for Wideband Digital GHZ Transmitters Design and SDR Applications

Sigma Delta Modulator Based Multi-Standard Transmitter Design For Wireless Communication Applications

Contact Info

Product

Resources

About