Circularly Polarized Printed Helix Antenna for L- and S-Bands Applications

Siahcheshm, A.; Nourinia, Javad; Ghobadi, Ch.; Shokri, Majid

doi:10.13164/re.2020.0067

Cited by 7 publications

(6 citation statements)

References 18 publications

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“…applications [28], [29]. The LT1228 [30] is a widely used commercially available operational transconductance amplifier with electronically variable transconductance gain (g m ), which makes circuits based on the LT1228 easy to operate with a microcontroller or microcomputer [10].…”

Section: Introductionmentioning

confidence: 99%

A New Method to Synthesise the Sinusoidal Oscillator Based on Series Negative Resistance-Capacitance and its Implementation Using a Single Commercial IC, LT1228

Kulapong

Jaikla

Siripongdee

et al. 2023

ELEKTRON ELEKTROTECH

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An alternative method for synthesising the sinusoidal oscillator based on series negative resistance-capacitance is presented in this paper. The proposed topology is constructed with the series negative resistance-capacitance circuit connected in parallel with a grounded resistor and capacitor. To validate the proposed method, a new grounded series negative resistance-capacitance simulator is also proposed as a subcircuit for synthesising the sinusoidal oscillator. The series negative resistance-capacitance simulator is based on a commercially available integrated circuit (IC), LT1228. The equivalent negative resistance and equivalent negative capacitance can be adjusted electronically using an external DC bias current. The sinusoidal oscillator that is synthesised using the proposed method consists of a single LT1228, two capacitors, and three resistors. The frequency and the condition of the oscillation are orthogonally adjusted. Also, the condition of oscillation is electronically controlled. The amplitude of the sinusoidal waveform is adjustable. In addition, the output voltage node of the proposed oscillator has a low impedance, which allows it to connect to other circuits without using an additional buffer. Both PSPICE simulation and experiment are used to validate the proposed circuits.

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Section: Introductionmentioning

confidence: 99%

A New Method to Synthesise the Sinusoidal Oscillator Based on Series Negative Resistance-Capacitance and its Implementation Using a Single Commercial IC, LT1228

Kulapong

Jaikla

Siripongdee

et al. 2023

ELEKTRON ELEKTROTECH

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“…AR bandwidth of 17% was achieved for an antenna height of 41 mm without using the parasitic patch, although 44% AR bandwidth was obtained by adding a parasitic patch at the top of the helix. Strip helix arms printed on four individual rectangular-shaped FR4 substrate materials and then combined to form a final rectangular-shaped end fire helix are presented in [11], and the AR bandwidth of 54% is achieved with an antenna height of 155 mm. A review article [12] focuses on the advantage of additive manufacturing in the design of antennas and RF structures.…”

Section: Introductionmentioning

confidence: 99%

“…According to the picture of constructed antenna, there is a very chance of deviation of the strip conductor due to handling and tilting the whole antenna system. Similarly, joining strips printed on four rectangular materials may cause any misalignment, and combining with the ground plane is an issue that needs extra consideration [11].…”

Section: Introductionmentioning

confidence: 99%

3D Printed Low Profile Strip-based Helical Antenna

Ghosh¹,

Harackiewicz²

2022

PIER C

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A copper strip and conductive paint-based low profile stripped helical antenna for circular polarization over wide axial-ratio (AR) bandwidth are presented. Impacts of strip widths and geometric parameters of the helix on antenna performance (impedance bandwidth, reflection coefficient, AR, gain) are analyzed thoroughly. In terms of performance parameters, the proposed design is also compared with traditional designs of wire and strip-based helical antennas. Proper impedance matching in the proposed design is achieved by the non-conformal placement of the strip. For easing the fabrication complexity, the antenna is again simulated with a dielectric-based supportive structure, and the impact of this additional support is discussed. The antenna is then constructed on a 3D printed polylactic acid (PLA) based structure. Finally, the 1.3-turn strip-based helical antenna with a radius of 18 mm provided impedance and 3-dB AR bandwidths of 99% and 82.52%, respectively. The maximum gain of 9.40 dBi was found at 2.05 GHz in 3-dB AR bandwidth. The height of the presented antenna is 0.35 λ 0 , where λ 0 is the free space wavelength at the frequency of 2.65 GHz. Low profile and wide AR bandwidth facilitate the use of this antenna in space communication.

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“…These antennas have attractive features such as wide impedance bandwidth, simple construction, easy integration with other microwave components, and a convenient radiation pattern [1]. Various forms of the printed antenna, including designs of array antennas for radar applications [2] and high-gain directional antennas for satellite utilization [3], have been recently presented. On the other hand, one of the attractive fields in the Multiple-Input/Multiple-Output (MIMO) system's design is printed antennas.…”

Section: Introductionmentioning

confidence: 99%