A SiGe BiCMOS Power Amplifier Using a Lumped Element-Based Impedance Tuner

Lee, Geunyong; Jung, Jong Hyun; Song, Jong−In

doi:10.1109/lmwc.2015.2505628

Cited by 12 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To mitigate this challenge, the industry has introduced the concept of tunable systems, which feature adjustable hardware parameters. Tunable designs, such as filters [5][6][7][8][9][10][11][12][13][14][15][16][17][18], couplers [19][20][21], and antennas [22], represent a significant advancement in this field. By incorporating tunability into these components, there is a substantial reduction in the number of passive elements required.…”

Section: Introductionmentioning

confidence: 99%

“…This scenario underscores the necessity for concentrated research in the field of frequency-tunable filters, a domain of critical significance in modern wireless technologies. The evolution of the design of tunable frequency filters has followed a trajectory that can be summarized in the following manner: Initially, the operational frequencies of these filters were modulated by switching between various bands, employing positive-intrinsic-negative (p-i-n) or microelectromechanical system (MEMS) switches [5][6][7]. In [5], a frequency-tunable filter based on a half-mode substrate-integrated waveguide (HMSIW) operating in the 1.2-1.6 GHz range was demonstrated, requiring six MEMS switches to be opened and closed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Compact Bandpass Filter with Widely Tunable Frequency and Simple Bias Control

Xiang,

Tan,

Ding

et al. 2024

Electronics

View full text Add to dashboard Cite

This research paper introduces an innovative design for a compact bandpass filter, notable for achieving a substantial tuning range of operational frequencies using just a single bias voltage. The design is based on a planar microstrip approach, distinguished by its straightforward and efficient structure. Additionally, this filter is characterized by its excellent performance in suppressing out-of-band frequencies. To validate the practicality and effectiveness of this novel design, a compact filter was designed, manufactured, and measured. The testing results were impressive, showing that the filter’s measured center frequency could be tuned across a wide spectrum, from 1.1 to 3.1 GHz, achieving a relative bandwidth of up to 95%. Herein, the relative bandwidth is derived from the calculation of 2(fhigh − flow)/(fhigh + flow). Remarkably, the filter consistently maintains a return loss exceeding 19 dB throughout its tuning range. Additionally, it sustains a 15 dB return loss bandwidth greater than 90 MHz, with the insertion loss varying between a minimum of 0.9 dB and a maximum of 2.1 dB. The compactness of the filter is one of its standout features, with circuit dimensions measuring a mere 0.06λg × 0.09λg (physical dimensions is 13.8 mm × 21.3 mm), where λg represents the wavelength at the filter’s lowest center frequency.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Compact Bandpass Filter with Widely Tunable Frequency and Simple Bias Control

Xiang,

Tan,

Ding

et al. 2024

Electronics

View full text Add to dashboard Cite

show abstract

“…These disadvantages can be overcome by electronic impedance tuners. A number of electronic impedance tuners utilise passive lumped elements [15], transmission line sections [16] and devices available in standard semiconductor technology [17], as well as microelectromechanical systems (MEMS) [18]. Such tuners can be easily integrated into the MMIC form of a chip as the part of a larger analogue system [11,19].…”

Section: Introductionmentioning

confidence: 99%

Wideband two‐port with programmable scattering parameters

Odrobina

Staszek

2019

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

A two‐port network featuring programmable reflection and transmission coefficients is proposed. The network exhibits a simple structure and can operate over a wide frequency range. A detailed description of the presented system is given, including the theoretical analysis and derivation of design equations. To assess the performance of the manufactured system, the tuning range of reflection and transmission coefficients was measured in the frequency range from 0.5 to 2.0 GHz. The obtained results show good agreement with the theoretical results over the entire two‐octave operational bandwidth. Moreover, the potential application of the developed two‐port for the generation of various reflection coefficients in calibration of a multiport reflectometer is demonstrated.

show abstract