Monolithic Microwave Integrated Circuits (MMICs)

Bahl, Inder J.

doi:10.1002/0471654507.eme271

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…This configuring of the HFNL and the cross-linked C-shaped resonators for creating band rejection attributes are obeying the equivalent circuit for an electric LC resonator. The calculations of resonance frequency for the electric LC resonators are attained from [32, 33] and are established to be 3.5 and 4.5 GHz. The desired results are attained after fine-tuning the calculated results for the resonant frequency of the electric LC resonators.…”

Section: Resultsmentioning

confidence: 99%

A novel isolation improvement technique using fractal neutralization line with dual band rejection attributes in a compact UWB MIMO antenna

Banerjee

Ghatak

2022

Int. J. Microw. Wireless Technol.

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A closely confined coplanar waveguide (CPW) fed MIMO antenna sheltering the entire ultra-wideband (UWB) spectrum with high isolation as well as dual-band rejection attributes is presented and evaluated. The intended wideband multiple-input multiple-output (MIMO) radiator embodies a pair of similar planar monopole elements (PME) together with the integration of the ingredients like a defected ground structure with Koch fractal boundaries, parasitic strips, cross-linked C-shaped parasitic resonators, and a Hilbert fractal neutralization line. The suggested UWB MIMO antenna houses an extensive bandwidth spanning between 2.64 and 12 GHz, sharply rejecting a pair of bands centered at 3.3 and 4.5 GHz. The wideband diversity antenna is realized in a closely packed measure of 26.50 mm (L) × 29.84 mm (W). A minute inter-element spacing of 0.51 mm is attained with the suggested layout. The numerical and experimental investigations of vital diversity parameters such as the envelope correlation coefficient, mean effective gain, total active reflection coefficient, as well as multiplexing efficiency depict high diversity performance. The consistency amidst the simulation as well as the empirical results recommends the worthiness of the intended antenna for handy UWB and UWB MIMO systems.

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Section: Resultsmentioning

confidence: 99%

A novel isolation improvement technique using fractal neutralization line with dual band rejection attributes in a compact UWB MIMO antenna

Banerjee

Ghatak

2022

Int. J. Microw. Wireless Technol.

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“…The initial dimensions of the antenna were obtained by using the circuit models explained before in combination with empirical equations [ 37 ]. Our previous experience proved to be very beneficial here.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

Metamaterial Inspired Varactor-Tuned Antenna with Frequency Reconfigurability and Pattern Diversity

Zhang,

Wang,

Yan

et al. 2024

Sensors

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A metamaterial-inspired varactor-tuned antenna with frequency reconfigurability and pattern diversity is designed. Two different versions of a reconfigurable structure are integrated into a single antenna to excite two different orthogonal patterns, which realizes pattern diversity for MIMO applications. The outer annular Composite Right-/Left-Handed Transmission Line (CRLH-TL) works at the 1 mode and provides a broadside pattern, and the inner circular radiator loaded with split ring resonators (SRR) operates at the 0 mode and radiates an omnidirectional pattern, which realizes pattern diversity. By using surface-mounted varactors, the operating frequencies for the two radiation patterns can be tuned over a wide frequency range, from 1.7 GHz to 2.2 GHz, covering the 1.71–2.17 GHz LTE band, and a low mutual coupling between the two radiators is achieved. The antenna has also been prototyped. The measured results are in good agreement with the simulation results, verifying the proposed concept. The dual-mode MIMO system equipped with the proposed antenna elements is discussed within the context of a 3-D channel model, and it shows a superior array compactness and spectral efficiency (SE) performance compared to scenarios with single-mode elements.

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“…The LNA and the bias tees are shown in figure 3 (left). The classical Wilkinson power divider [8] is not intrinsically wideband due to the quarter-wave line centered at only one frequency f o . Several multi-way Wilkinson stages can be developed in order to cover several characteristic frequencies but then a large reduction of the bandwidth and large insertion loss are expected.…”

Section: Analog Front-endmentioning

confidence: 99%

KAPTURE-2. A picosecond sampling system for individual THz pulses with high repetition rate

et al. 2017

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This paper presents a novel data acquisition system for continuous sampling of ultrashort pulses generated by terahertz (THz) detectors. Karlsruhe Pulse Taking Ultra-fast Readout Electronics (KAPTURE) is able to digitize pulse shapes with a sampling time down to 3 ps and pulse repetition rates up to 500 MHz. KAPTURE has been integrated as a permanent diagnostic device at ANKA and is used for investigating the emitted coherent synchrotron radiation in the THz range. A second version of KAPTURE has been developed to improve the performance and flexibility. The new version offers a better sampling accuracy for a pulse repetition rate up to 2 GHz. The higher data rate produced by the sampling system is processed in real-time by a heterogeneous FPGA and GPU architecture operating up to 6.5 GB/s continuously. Results in accelerator physics will be reported and the new design of KAPTURE be discussed.

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Monolithic Microwave Integrated Circuits (MMICs)

Cited by 6 publications

References 15 publications

A novel isolation improvement technique using fractal neutralization line with dual band rejection attributes in a compact UWB MIMO antenna

A novel isolation improvement technique using fractal neutralization line with dual band rejection attributes in a compact UWB MIMO antenna

Metamaterial Inspired Varactor-Tuned Antenna with Frequency Reconfigurability and Pattern Diversity

KAPTURE-2. A picosecond sampling system for individual THz pulses with high repetition rate

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