A Wideband Differential-Fed Slot Antenna Using Integrated Compact Balun With Matching Capability Han Wang, Zhijun Zhang, Yue Li, and Zhenghe Feng ... The evolution of the proposed slot antenna (a) Microstrip feed slot (b) Loop directly feed (c) Loop to slot feed (d) Loop to T-slot feed. Fig. 3. Bandwidth comparisons among four types of slot ... Flexible spiral antenna with microstrip tapered infinite ... In this paper we introduce a flexible, side-fed, ultra-wideband, spiral antenna with an integrated microstrip tapered infinite balun operating from 1-5GHz. It was fabricated using Rogers 5880 subtrate and specially coated to prevent oxidization. The simulation and measurements match quite well with S11 below -10dB throughout the frequency range and gain of close to 5dB and average efficiency ... The broadband, shallow, reflecting cavity-backed slot ...
US Patent for Slot spiral antenna with integrated balun
A Wideband Balun - CiteSeerX How Does it Work? Antennas often require a balanced feed system like the circuit described ... The balun shown in. Figure 1 is intended to be used with a spiral antenna. The CPW-to-CPS .... slot are smaller resonance length and wider bandwidth. [11]. Based on ..... The balun could easily be integrated as part of a microstrip ... Kent Academic Repository - University of Kent stacked patches [4], slot antenna [5] and magneto-electric dipole [6] are also good .... To feed the antenna, an integrated balun which transforms the unbalanced ..... order to provide a fair comparison, the spiral antenna was designed by using ... Electronics | Free Full-Text | Low Profile Sinuous Slot Antenna for ...
A new planar spiral antenna with integrated impedance transformer is presented which needs no external balun and can be fed by a coplanar waveguide. The proposed structure has a return loss of < 10 dB over a broad bandwidth of 0.5–5 GHz that is
Journal of Computing::Adaptive Antenna Array Approach in the ... slot spiral is not burdened with many of these difficulties and as is demonstratedin this paper, the balun and feed structure can be integrated into the planar radiating structure.The traveling wave, formed on spiral arms, allows for broadband performance, fast wave due to mutual coupling phenomenon occurring between arms of spiral and US5815122A - Slot spiral antenna with integrated balun and ... A slot spiral antenna with a planar integrated balun and feed. The slot spiral is produced using standard printed circuit techniques and comprises a dielectric substrate having a conductive layer which is etched to form the radiating slot spiral. An integrated microstrip feed is included to provide a balanced feed to the slot spiral. A new planar feed for slot spiral antennas - IEEE Journals ... Abstract: A new planar, wideband feed for a slot spiral antenna is presented and tested at VHF frequencies. Radiation pattern measurements are presented to demonstrate the performance and usefulness of this feed. In contrast to most traditional printed spiral antenna designs, the one presented here incorporates a completely planar balun and feed, making it more attractive for conformal ...
A new planar spiral antenna with integrated impedance transformer is presented which needs no external balun and can be fed by a coplanar waveguide. The proposed structure has a return loss of < 10 dB over a broad bandwidth of 0.5–5 GHz that is
The spiral antenna uses the finite grounds of the stripline feed network ... match a spiral antenna by tailoring its spiral constant K (related to slot-to-metal ratio) to ... with integrated feed structure, impedance transformer, and dyson-style balun. 2. Spiral Antenna Miniaturization with High-contrast ... - ETD (OhioLINK)
I designed an Archimedes Spiral antenna which operates from 300 MHz to 3GHz, but the impedance is around 100 ohms. Since the antenna is balanced, I also need a balun, but I can't find any 100:50 balun available in this range.
How Does it Work? Antennas often require a balanced feed system like the circuit described ... The balun shown in. Figure 1 is intended to be used with a spiral antenna. The CPW-to-CPS .... slot are smaller resonance length and wider bandwidth. [11]. Based on ..... The balun could easily be integrated as part of a microstrip ... Low-profile broadband dual-mode four-arm slot spiral antenna with ... The authors propose a low profile 4-arm slot spiral for broadband commercial ... A finite-element boundary-integral (FE-BI) based numerical tool is ... Low-profile broadband dual-mode four-arm slot spiral antenna with dual Dyson balun feed.
We present a novel conformal, lightweight and load bearing spiral antenna on textiles for conformal applications. The antenna and its integrated planar balun were embroidered using a standard sewing machine with very thin (diameter=0.22mm) Liberator ™ E-fibers. There fibers can achieve geometrical accuracy down to 0.3mm and even 0.1mm. A side-fed spiral antenna for near-field coupler applications ... Spiral antennas are typically fed at the center of the spiral arms , , , but many designs feed the antenna from the side , , , , , . In both cases, impedance matching is required to efficiently feed the spiral antenna design since the ideal impedance of a self-complementary spiral antenna is 188Ω . An infinite balun involves the use of an ... Waveguide Slot Array Antenna with a Hybrid-Phase Feed for ... Although a 25 dB Chebyshev tapering was applied, the conventional alternating-phase-fed slot array antenna produces a high grating lobe level of −17.2 dB at 𝜃 = ±63∘ . However, the grating lobe level of the proposed waveguide slot array antenna incorporating the hybridphase feed is decreased to −25.3 dB, which is 8.1 dB lower COPLANAR WAVEGUIDE-FED PLANAR SPIRAL ANTENNA WITH INTEGRATED ... A new planar spiral antenna with integrated impedance transformer is presented which needs no external balun and can be fed by a coplanar waveguide. The proposed structure has a return loss of < 10 dB over a broad bandwidth of 0.5–5 GHz that is