Broadband Differential Low-Noise Amplifier for Active Differential Arrays

Garcia-Perez, O.; Segovia-Vargas, Daniel; García-Muñoz, Luis Enrique; Jiménez-Martín, José Luis; González-Posadas, V.

doi:10.1109/tmtt.2010.2091199

Cited by 25 publications

(13 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Discrete transistor designs are cheaper and easier to implement. A differential LNA based on discrete transistors was presented in [9] and [10], but working either at higher frequencies or at lower frequencies and with a relatively narrower bandwidth than the present work. In our recent work [11] we presented an LNA suitable for a connected array phased array feed operating in the 0.7-1.8 GHz frequency range with <40 K noise temperature.…”

Section: Introductionmentioning

confidence: 89%

“…10 shows the differential to single ended amplifier and geometric stability factor and noise temperature. The stability parameter used in this analysis is the geometric stability factor used in [10]. This factor is obtained as a function of the mixed-mode S-parameters S ddij (differential excitations in the input planes) of the amplifier.…”

Section: Impedance Matchmentioning

confidence: 99%

See 1 more Smart Citation

Broadband low noise amplifier for connected array phased array feeds

Ranga

Shaw

Hay

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

View full text Add to dashboard Cite

We describe the design and analysis of a broadband low noise amplifier suitable for connected array phased array feeds (PAFs) operating in 0.7 to 3 GHz frequency range. The LNA is a designed in a single ended configuration and analysis is carried out to form a differential amplifier with noise match impedance of the order of 300 Ω. Predicted results show a noise temperature of less than 21 K over the range of frequencies.

show abstract

Section: Introductionmentioning

confidence: 89%

Section: Impedance Matchmentioning

confidence: 99%

Broadband low noise amplifier for connected array phased array feeds

Ranga

Shaw

Hay

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

View full text Add to dashboard Cite

show abstract

“…The circuit schematic of the proposed differential lownoise amplifi er is shown in Figure 7 [12]. It consisted of two cascaded differential-pair stages.…”

Section: Low-noise Amplifi Er Designmentioning

confidence: 99%

Broadband active differential array for the mid-frequency SKA band

Garcia-Munoz

Segovia-Vargas

Garcia-Perez

et al. 2014

IEEE Antennas Propag. Mag.

View full text Add to dashboard Cite

This paper presents the design and characterization process of an active array demonstrator for the mid-frequency range (i.e., 300 MHz-1000 MHz) of the future Square Kilometre Array (SKA) radio telescope. This demonstrator, called FIDA3 (FG-IGN: Fundación General Instituto Geográfi co Nacional -Differential Active Antenna Array), is part of the Spanish contribution for the SKA project. The main advantages provided by this design include the use of a dielectricfree structure, and the use of a fully-differential receiver in which differential low-noise amplifi ers (LNAs) are directly connected to the balanced tapered-slot antennas (TSAs). First, the radiating structure and the differential low-noise amplifi ers were separately designed and measured, obtaining good results (antenna elements with low voltage standingwave ratios, array scanning capabilities up to 45°, and noise temperatures better than 52 K with low-noise amplifi ers at room temperature). The potential problems due to the differential nature of the proposed solution are discussed, so some effective methods to overcome such limitations are proposed. Second, the complete active antenna array receiving system was assembled, and a 1 m 2 active antenna array tile was characterized.

show abstract

“…[10] treated differential antenna like a two port component and measured the return loss of a differential antenna using 2 coaxial port simultaneously, but didn't use an active device or a power amplifier for feeding balanced antenna. Few researchers have reported the integrated-antenna concept applied to push-pull power amplifiers [11][12][13] but push-pull is not a true differential feed, which consists 2 output terminals along with a third common ground terminal. The benefits of using a true differential amplifier fed by a balanced antenna as a receiver have been demonstrated already in [14], so our interest was to explore a transmit antenna.…”

Section: Introductionmentioning

confidence: 99%

Benefits of active transmit balanced antenna fed by differential power amplifier

Sagor

Callaghan

2014

2014 Loughborough Antennas and Propagation Conference (LAPC)

View full text Add to dashboard Cite

Abstract-A differential amplifier feeding a balanced antenna is investigated experimentally. This approach would suit modern RFIC design rather than using a 50Ω unbalanced connection. As such the balun or power-combining network is eliminated resulting in a compact RF front-end design with wider bandwidth and lower losses. Experimental result shows that this technique promises higher output power compared to conventional feeding approach while using same RFIC and same power supply.Keywords-balanced antenna, differential amplifier, power amplifier (PA), free space path loss.

show abstract

Broadband Differential Low-Noise Amplifier for Active Differential Arrays

Cited by 25 publications

References 15 publications

Broadband low noise amplifier for connected array phased array feeds

Broadband low noise amplifier for connected array phased array feeds

Broadband active differential array for the mid-frequency SKA band

Benefits of active transmit balanced antenna fed by differential power amplifier

Contact Info

Product

Resources

About