ERASP: A new reflectarray antenna for space applications

Apert, C.; Koleck, T.; Dumon, P.; Dousset, T.; Renard, Christian

doi:10.1109/eucap.2006.4584615

Cited by 19 publications

(12 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One class of these methods are based on using materials with tunable electromagnetic parameters by bias voltage, such as liquid crystal [12][13][14][15][16][17], Barium Strontium Titanate (BST) [18] and ferroelectric materials [18][19][20]. The other class is based on using the electronical elements such as PIN diodes [21,22] [28]. The third class is mechanical method in which the phase shifting from each element is changed using small electrical motors [29].…”

Section: Introductionmentioning

confidence: 99%

A Novel Bandwidth Enhancement Technique for X-Band Rf Mems Actuated Reconfigurable Reflectarray

Ra’di¹,

Nikmehr²,

Poorziad³

2011

PIER

View full text Add to dashboard Cite

Abstract-In this paper, a wideband microstrip antenna for Xband (8.2 GHz-12.4 GHz) applications is introduced. First, simple patch antennas are studied, and a narrowband reflectarray antenna is designed. The resultant design demonstrates better performance than the previously published narrowband microstrip reflectarray antennas. The important features of the employed elements are simple structure, linear operation, and use of Radio Frequency Micro Electro Mechanical Systems (RF MEMS) switches for programmable pattern control. Next, employing our novel method, the designed narrowband structure is converted to broadband reflectarray antenna that can cover the whole X band. This novel idea is based on introducing several ground plane slots and controlling their electrical lengths by RF MEMS switches. By means of this method, 952 and 587 degree phase swing are achieved for continuous and discrete slot length variations, respectively. Application of this method along with smaller switches results in phase swing improvement of up to 1616 degree. In all structures a RT duroid (5880) substrate is selected to lower the back radiation. The achieved return loss in all cases is less than 0.32 dB. In comparison with the previous publications, our novel bandwidth enhancement technique has more generalization capability and results in single layered broadband reconfigurable microstrip reflectarray antennas with linear phase swing, lower cost, and ease of RF MEMS implementation.

show abstract

Section: Introductionmentioning

confidence: 99%

A Novel Bandwidth Enhancement Technique for X-Band Rf Mems Actuated Reconfigurable Reflectarray

Ra’di¹,

Nikmehr²,

Poorziad³

2011

PIER

View full text Add to dashboard Cite

show abstract

“…Other reflectarray elements, such as patches aperture coupled to delay lines, can be used to implement the phase control by inserting varactors, PIN diodes, or MEMS (micro-electromechanical switches) [29][30][31]. These technologies are suitable for control at the element level, which permits two-dimensional beam scanning.…”

Section: Application: Beam-scanning Antennamentioning

confidence: 99%

Analysis of dual-reflector antennas with a reflectarray as subreflector

Arrebola

Haro²,

Encinar

2008

IEEE Antennas Propag. Mag.

View full text Add to dashboard Cite

In this paper, a modular technique is described for the analysis of dual-reflector antennas using a reflectarray as a subreflector. An antenna configuration based on a sub-reflectarray and a parabolic main reflector provides better bandwidth than a single reflectarray, and has a number of advantages compared with a conventional dual-reflector antenna. Examples include the possibility of beam shaping by adjusting the phase on the sub-reflectarray, and potential capabilities to scan or reconfigure the beam. The modular technique implemented for the antenna analysis combines different methods for the analysis of each part of the antenna. First, the real field generated by the horn is considered as the incident field on each reflectarray element. Second, the reflectarray is analyzed with the same technique as for a single reflectarray, i.e., considering local periodicity and the real angle of incidence of the wave coming from the feed for each periodic cell. Third, the main reflector is analyzed using the Physical Optics (PO) technique, where the current on the reflector surface is calculated by summing the radiation from all the reflectarray elements. Finally, the field is calculated on a rectangular periodic mesh at a projected aperture, and then a time-efficient fast Fourier transform (FFT) algorithm is used to compute the radiation pattern of the antenna. The last step significantly improves the computational efficiency. However, it introduces a phase error, which reduces the accuracy of the radiation patterns for radiation angles far away from the antenna's axis. The phase errors have been evaluated for two integration apertures. It has been demonstrated that accurate patterns are obtained in an angular range of ±6°, which is sufficient for large reflectors. The method of analysis has been validated by comparing the results with simulations obtained from GRASP8. Finally, the theoretical beam-scanning performance of the antenna is analyzed.

show abstract

“…The gathered-diodes method stated in [15] also causes a high grating lobe level because of the reduced phase sampling mechanism for the reflectarray development. Another type of reflectarray steered by PIN diodes is stated in [16,17]. The extra grid walls configured for the reconfigurable unit cell lead to a significant manufacturing difficulty.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable reflectarray antenna using single‐layer radiator controlled by PIN diodes

Li¹,

Abbosh

2015

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

A new type of pattern-reconfigurable reflectarray phased by reconfigurable unit cells that are centrally controlled by a laptop is presented. The proposed reflectarray with single-layer radiators employs a phasing element formed by a fixed-size circular ring attached by a variable-length arc phase delay line controlled by positive-intrinsic-negative diodes. The biasing network of the diodes is properly designed to minimise the interference between the radiating structure and the biasing circuit. To that end, the biasing circuit is placed on a substrate layer below the ground plane whereas the PIN switching diodes are embedded within radiators. The biasing signal is transmitted to the switching elements at the top layer using vias that penetrate the thin substrate layer, the foam layer and the ground plane. Investigations are carried out to verify the performances of the phasing element using a waveguide simulator. A reflectarray, which includes a C-band offset fed 8 × 8 elements, is configured to switch its main beam between 20°and 30°from the broadside direction. A biasing control unit is added to the fabricated reflectarray and activated using a laptop. The measured radiation patterns of the proposed reflectarray demonstrate a beam-switching characteristic from the broadside direction, which confirm the proposed design method.

show abstract

ERASP: A new reflectarray antenna for space applications

Cited by 19 publications

References 0 publications

A Novel Bandwidth Enhancement Technique for X-Band Rf Mems Actuated Reconfigurable Reflectarray

A Novel Bandwidth Enhancement Technique for X-Band Rf Mems Actuated Reconfigurable Reflectarray

Analysis of dual-reflector antennas with a reflectarray as subreflector

Reconfigurable reflectarray antenna using single‐layer radiator controlled by PIN diodes

Contact Info

Product

Resources

About