Premo New Technology Reduces Emitter Antennae Length by 50% for Automotive Electronics.
The Diabolo™ Core Patented Technology for Emitter Antennae in Car Keyless Entry Systems developed by PREMO spares space and allows shorter and more robust devices.
Automotive Passive Keyless Systems ( Fig 1) are growing in global market penetration. By 2025 more than 25% of newly-assembled light vehicles are forecasted to have a Keyless Entry system. A global production that is more than 30M systems per year. Market demand for better performance in terms of longer reading range, less energy consumption, smaller size, and component count and costs is leading to systems with fewer antennae ( 3 instead of 5) but necessarily, the antennas must be longer to generate larger fields equivalent to the radiation pattern of 5 antennae. Premo has developed 2 alternatives:
Longer flexible antennas based on Alma™ Technology for Mid-Range and Long Range or the new Diabolo™ technology generates the same magnetic field that long brittle conventional single-core ferrite antennas with 50% shorter length and improving mechanical resistance and reliability.
Fig.1
Passive Keyless Entry system is a generic term for automotive technology which allows a driver to lock and unlock a vehicle without using the corresponding key fob buttons. Once a driver enters a vehicle with an equipped PKE or Keyless Go keyfob (or cardkey), they have the ability to start and stop the engine, without inserting the Smart Key. A transponder antenna built within the key fob allows the vehicle to identify a driver. The SMD components located in the smart key are required high levels of sensitivity, good temperature stability, and robustness against mechanical shocks and drops.
The system works ( Fid 2) by having a series of LF (low frequency 125 kHz) transmitting antennas both inside and outside the vehicle. The external antennas are located in the door handles, mirrors, or trunk position.
The system works ( Fid 2) by having a series of LF (low frequency 125 kHz) transmitting antennas both inside and outside the vehicle. The external antennas are located in the door handles, mirrors, or trunk position.
There are two clear areas, the Car side, and the Keyfob side. Current technology trends push the car side to reduce the component count so that fewer antennas are needed and to improve the performance to move from 4-5 short-range antennas to 3 Mid-range antennas and ultimately to 2-1
Long Range Antennas
Fig.2
PKE/KGO/KES Systems work by having a series of LF (low frequency, 20kHz, 125kHz & 134kHz) transmitter antennas, depending on chip-set used, both inside and outside the vehicle. External antennas are located in the door handler, mirrors, or trunk position. When a vehicle is triggered either, close to the vehicle, pulling the handle, or touching it an LF signal is transmitted from the antennas to the Key. Key is activated and transmitted its ID back to the vehicle using RF channel, if Keycode is correct the electronic module unlocks the vehicle.
The antennas typically have to meet the AEC-Q200 (specific automotive quality standard) and waterproof specs from IP54 to IP69K standards due to their specific packaging (a rugged plastic box filled with polyurethane foam, PA LPM protection, Epoxy coatings, or over-molding or HPM in PBT GF30 for IP69K).
According to the introduction, Mid-range antennas are longer than Short-Range antennas and Long-range antennas are even longer than Mid-range antennae ( Fig3 ).
Fig.3
1.Longer devices have obvious advantages:
- Longer range
- Lower component count thus
- Higher System reliability
- Lower total system cost.
2.Nevertheless, because of the intrinsic brittleness of ferrites, longer antennae need longer cores that have several drawbacks:
- Very brittle.
- Very poor thermal stability
- Reduced Mechanical performance:
- Very poor bending resistance
- Very Poor torsion resistance
3.Because of this, there are costs and manufacturability challenges:
- Long ferrite cores production becomes critical because of a “banana effect” during the shrinkage in the sintering process.
- Small contraction and dilatation of a high L/D ratio make a high impact on effective magnetic permeability thus producing a lack of stability of L and SRF parameters over a temperature range.
- Mechanical protection of the core with plastic housings and or resins becomes costly and critical as combined thermal coefficients are critical.
- Manufacturing costs soar as the tools and molds are much bigger and complex (higher Capex) while throughput is lower than in smaller parts because of the brittleness and lower mechanical resistance.
The cost of materials, and the process is then much higher thus reducing the advantage of a lower component count per vehicle.
The logic of a lower total system costs by using fewer antennas is spoiled if those antennas cost is much higher than their short-range equivalents. Therefore, the technical challenge is achieving all the advantages of Mid-range and Long-range antennas without the above-mentioned drawbacks of brittleness, costly materials, processes and investments, and critical temperature and mechanical performance.
I a short sentence Diabolo ™ Antennas stand for: All the good features of Mid-Range antennas while preserving and keeping all the good features of the short-range antennas (cost-effective, mechanically robust, and thermally stable).
Premo innovation consists of using a Core with a Variable Cross-Sectional area that is maximum at both extremes of the antenna and minimum at the center of the antenna where the winding is located.
For a constant H field, induction B is proportional to the density of magnetic field lines and the effective magnetic permeability of the material. For the same magnetic material and the same number of turns (identical winding N = constant), the induction B in a portion of the core with half the cross-sectional area is double. Thus, a decreasing section core would concentrate magnetic field to maximize induction B at the point where cross-sectional areas are minimum.
Fig.4
Fig.5
A simple approach is a single core that has a constant reduction of section up to 50% and a winding of N turns in the center at the point with the lowest Cross-Sectional area like in Fig 5
For an external magnetic field H and given the same effective magnetic permeability of the core, the Magnetic Flux φ through the core is constant and the induction at every point is B= φ/S being S the cross-sectional area perpendicular to the flux.
In the shape of figure 5 and Fig 6 in the following shapes the induction B at the narrowest point is double that the one at the widest.
Fig.6
A larger cross-sectional area can be presented to the external H field, then increasing the Magnetic Flux φ through the core when a radius R is given like in FIG 6 in order to guide the maximum number of field lines through our low Reluctance Path that is the core.
Fig.7
The invention of cross-sectional area reduction in emitter antennas has a significant advantage in Mid-Range antennas as a similar range, induction, sensitivity, size, and cost can be achieved when compared to the prior art mid-range antennas.
A logic evolution from a constant height core is a 3D core that can present a constant reduction of the cross-sectional area including a reduction of height like in Fig 7
A graphic representation of the effect of concentration of field lines when the Magnetic Flux φ is constant along the core can be seen in FIG 4.
The effect of magnetic amplification has been described as the improvement of effective permeability (µr) of apparent permeability (µapp) considered as the ratio between the internal flux density in the core (Bn) and the external flux density (Bext)
Being µr the relative permeability of the core and Nz the demagnetizing field factor.
As knowing this Nz factor is difficult, for a given shape there are empirical formulas charts, and abacus. In the case of a rod (a pure cylindric shape) we introduced already the L/D empirical chart (courtesy of Ferroxcube):
A simplified equation for the demagnetizing factor in direction z (longitudinal) is:
The graphic representation for a rod is the already mentioned graph.
Magnetic concentration of a Diabolo™ shape core with D the larger diameter, d the smaller diameter and µr the relative magnetic permeability of the core, the apparent permeability µapp will be:
In summary, the greater the ratio L/D and the larger the ratio d/D the better.
An optimized embodiment of the core that presents a progressive cross-section reduction and a maximum surface on both sides of the core is as per Figure 8.
Fig.8
Fig 9 shape simulation shows the much higher induction ( red ) in the minimum section area:
Fig.9
Long Flexible antennas Like Premo Alma ™ Technology AF series described in patent EP3333 860A1 can be made with this invention also, including echelons/links as per following figure 10 :
Fig.10
Image.1
Image 1 shows a real off tool Diabolo ™ Antenna that is 60mm or 50% shorter than Premo Conventional KGA mid-range conventional antenna ( Image 2):
Image 2
Table 1 shows H magnetic fields generated at 3m by identical excitation currents.
The invention solves the technical challenges in the following way. All the good features of Mid-Range antennas while preserving and keeping all the good features of the short-range antennas (cost-effective, mechanically robust, and thermally stable)
●Good features of Mid-Range Antennas
■Long-range
■The invention generates the same magnetic field as a Mid and long-range antenna in a smaller size.
■Lower component count
■The same number of devices can be installed per vehicle
■Lower Assembly cost
■A lower number of devices to be installed means lower assembly time and assembly costs.
●Good Features of Short- Range antennas
■Cost-Effective: the invention has a lower cost (target accomplished) than a Mid Range antenna:
■Less Ferrite
■Less Copper wire due to lower N value to achieve same inductance L
■Smaller plastic housing and less potting/ coating / encapsulating materials to secure waterproof
●Mechanically Robust
■A shorter device with a lower L/D ratio withstands bending, torsion and flexion better.
●Thermally stable
A shorter core produces smaller absolute changes in dimension with temperature. Contractions and dilatations affect less to the change of shape. The effect is minimized when the L/D ratio is lower as the changes in effective permeability due to changes in L/D with temperature expansions are lower.
An embodiment with progressive reduction of core Width and Height.
Comparison results of a 124x 6.5x 3 Mid-Range core vs an 80x8x 29/6 Diabolo ™ core of identical MnZn Material.
Measuring H Field at 1meters and 3meters the 40% shorter Diabolo™ core presents similar values and a much higher Q factor due to its higher effective permeability and lower number of turns thus lower DC Resistance.
- |
- +1 赞 0
- 收藏
- 评论 0
本文由三年不鸣转载自PREMO,原文标题为:Premo New Technology reduces Emitter Antennae Length by 50% for Automotive Electronics.,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
相关推荐
Premo Nanotech Magnetic Materials Allow Long Flexible Emitter Antennae for Automotive Electronics
The Alma™ Core Technology for Car Keyless Entry Systems saves installation, cables, electronic drivers and reduces component count with savings per vehicle over 100 USD.
The Lowest Profile 3D Antenna Coil Available in The Market | PREMO
PREMO, the leading manufacturer of inductive components, announces the 3DC14EMR-ULP series, the lowest profile 3D antenna coil available (below 50% when compared to other antenna coils in the market today). The majority of the 3D electromagnetic sensors available in the market have minimum heights of 3.2mm. The lowest profile 3D coil prior to the release of the ULP series was the PREMO 3DC06 series with a maximum height of 2.5mm.
【技术】Premo核心专利技术Diabolo™,将汽车电子的发射天线长度减少一半
Premo公司开发的、用于汽车无钥匙进入系统中发射天线的Diabolo™核心专利技术,成功实现天线长度减少一半,同时确保具有中程天线的良好特性,保留并保持短程天线的所有良好特性(经济高效、机械坚固和热稳定)。
PREMO(普莱默)推出3DTX10/3DTX08系列发射天线的新闻稿
PREMO launches the 3DTX10 and 3DTX08family of emitter antennae.
PREMO - 发射天线,EMITTER ANTENNAE,3DTX08,3DTX10,手套,AR和虚拟现实设备,AR/VR,套装,增强现实/虚拟现实,耳机,应收账,VR DEVICES,SUITS,运动捕捉,AR,GLOVES,CONTROLLERS,AUGMENTED REALITY/VIRTUAL REALITY,控制器,MOTION CAPTURE,VR设备,HEADSETS,应收账款/虚拟现实,AR AND VR DEVICES
PREMO型号3DC11LP-0720J低频天线的天线仿真资料有没有呀?
您好,这部分资料原厂尚未公开可以看下相关参数资料https://www.sekorm.com/doc/1487449.html
Application of MMSZ5250B Zener Diode in Automotive Electronics
The MMSZ5250B Zener diode is characterized by high precision, low power consumption, and low reverse current. It has a nominal voltage of 20V with an accuracy of ±5%, a power rating of 500mW, and a reverse current (Ir) of just 0.1nA at 15V. These parameters make the MMSZ5250B Zener diode highly promising for use in automotive electronic systems.
【选型】PREMO(普莱默)RFID/NFC天线选型指南
PREMO - 高灵敏度SMD各向同性3D线圈,微型NFC天线,NFC组件,Z轴空心线圈NFC天线,微型单轴NFC天线,通信线圈,3轴感应器,RFID天线,最小单轴天线,单轴NFC天线,薄型3D线圈,TPMS天线,NFC天线,RFID组件,Z轴NFC天线,单轴感应,3DC11-DR,ZC1003HF,3DC11 LP-AOIC,SDTR1103-HF1,SDTR1103-HF2,3DC06EM,3DC11 LP-AOIF,TC1102,TP0702,3DC11F,3DC09LP,3DC15F,3DC11LP-AOIC,4DC15NF,TP702UCAP,3DC14-ULP,TC0902,3DC11LP-AOIF,SDTR1103,TC0502,3DC15-HF,3DC11LP,TC0502HF,3DC14S,3DC11AOI-05DR,TP602CAP,3DC11CAP,ZAC1203,3DC12S,2D1D15,ZC1003,TP0602,TR1102,3DC14EM,TP502CAP,3DC12EM,3DC13S,SDTR1103EM,3DC11 LP-AOI,TP702-CAP,SDTR1103CAP,TC0602-TC,TR1102-CAP,ZC11810HF,3DC11LP3DC11CAP,3DC11LP-AOI,3DC15,3DC06ISO,TP0702U,3DC15CAP,电信,汽车,MR,钥匙,虚拟现实,应收账,IOT,TPM,AR,智能电网,物联网,VR,先生,工业
PREMO Launches The MICUs – NB & BB Series for Non-intrusive Inductive Coupler
PREMO launches the MICUs – NB & BB series for non-intrusive inductive coupler in PLC (Power Line Communication) Medium Voltage Network and Electric Vehicle smart charging diagnosis applications (V2G)This innovation is designed for a combined use of narrow-band and broad-band communication in the same inductive coupler.
ELETE Press-fit With High Electrical Reliability, Suitable For Communications, Automotive Electronics, Medical And Other Industries
Press-fit technology is an alternative solution to weld mounting. The reliable connection of electrical contacts is realized mainly through the non-welding method of cold connection.The Press Fit end is pressed into the PCB hole to obtain a higher clamping force with a smaller pressing force. During pressing, it deforms elastically and provides tight connections with low contact impedance and high reliability.Because of its high electrical reliability, ELETE Press-fit are widely used in communications, automotive electronics, medical and other industries.
PREMO(普莱默)NFC天线解决方案
PREMO公司提供全球范围内的NFC天线解决方案,包括高性能材料、定制设计和多种产品范围。其天线适用于移动支付、物理访问、点对点文件传输等多种应用,具有高灵敏度、紧凑型设计和小尺寸特点。PREMO天线在NFC市场迅速发展的背景下,致力于满足更小外形和更薄外形的要求,提供快速交付服务。
PREMO - SMD 3轴NFC天线,NFC天线,超小SMD单轴NFC天线,SMD Z轴NFC天线,SMD 3轴NFC/LF天线,SMD单轴NFC天线,3DC15HF-0003K,RF430CL330HTB,TRF7970A,3DC15HF-003K,ZC1003HF,2D1D15,ST25R3911B,SDTR1103-HF2-0002K,3DC15HF,TC0502HF,ST 25,TMS37114,SDTR1102-HF2,身份识别,票务,无现金付款,安全PC登录,会员&优惠卡,NFC,汽车解锁,物理访问,交通
【选型】PREMO(普莱默)发射天线选型指南
PREMO - TX 天线,PREMO TX天线,门把手天线,发射天线,KGEA-DHS,KGEA-DHSL,KGEA-MRHB,LFAD-BFC,KGEA-BFCAM,KGEA-HB,KGEA-HBB,LFAD-MRLC,SEA,KGEA-SMD,KGEA-HBW,KGEA-AFC,LFAD-BF,KGEA-BFCWX,KGEA-BFCR,LFAD-MRL,KGEA-AF,KGEA-MR,KGEA-HBT,AR,电信,汽车,MR,智能电网,虚拟现实,物联网,应收账,VR,先生,工业,IOT
PREMO新推最大占空比为85%的反激式变压器FLYT-004及FLYT-005,开关频率为50–300kHz
PREMO新型FLYT-004和FLYT-005变压器适用于车载EV/PHV AC/DC电池充电器,具有准谐振反激模式,开关频率为50kHz – 300kHz,最大占空比为85%。反激式变压器可以实现高电路隔离、多路输出,提供正或负输出电压。
【选型】PREMO(普莱默)电感耦合器选型指南
PREMO - 密歇根大学,中压电感耦合器,电感耦合器,MICU,MICU 300A,MICU 300A OH/LF,MICU 300A WF/LF,MICU 300A S/LF,电信,汽车,MR,AMR,虚拟现实,应收账,公用事业,IOT,户外裸露架空电力,AR,自动抄表,电力线监测系统,智能电网,物联网,VR,先生,配电系统自动化,工业
【产品】PREMO新推用于电力线通信的PLC-LW系列SMD信号变压器,AEC-Q200合格
PREMO是制造RFID磁传感器,电感耦合器和功率磁性元件的领导者,新推出的PLC-LW系列SMD信号变压器完善了其信号变压器系列,使用线性绕组,采用NiZn磁芯设计,在1-30MHz的宽频段内提供最小的插入损耗,并可用于高达100MHz的通信。
PREMO薄型SMD 3D11线圈选型表
提供了premo薄型SMD 3D11线圈选型,涵盖具有相同电气和机械特性的3DC11LP的AOI版本,适用于汽车应用(Keyless Entry Systems RTPMES),温度稳定性高,可用频率范围20kHz~134kHz
产品型号
|
品类
|
L x,y,z(mH)
|
Q x,y nom
|
Qz nom
|
f (kHz)
|
SRFx,y(kHz)Min
|
SRFz(kHz)Min
|
DCRx(Ohm)Max
|
DCRy(Ohm)Max
|
DCRz(Ohm)Max
|
Cpxy(pF)Max
|
Cpxz(pF)Max
|
Cpyz(pF)Max
|
Sensitivity x,y(mV/A/m)Min(*)
|
Sensitivity z(mV/A/m)Min(*)
|
3DC11LP-AOI-0238J
|
Low Profile AOI SMD 3D11 Coil
|
2.38
|
25
|
19
|
125
|
700
|
750
|
50
|
55
|
83
|
25
|
10
|
10
|
40
|
38
|
选型表 - PREMO 立即选型
电子商城
服务
可定制变压器电压最高4.5KV,高频30MHz;支持平面变压器、平板变压器、OBC变压器、DCDC变压器、PLC信号变压器、3D电源、电流变压器、反激变压器、直流直流变压器、车载充电器变压器、门极驱动变压器等产品定制。
最小起订量: 100000 提交需求>
可定制车载智能天线频率:20kHz、114.5 kHz、120- kHz、125 kHz、134 kHz、134.2kHz、134.5 kHz;工作温度范围:-40ºC to ~125ºC;电感范围:100~734;符合AEC-Q200(汽车质量标准)和IP68标准;
最小起订量: 1 提交需求>
登录 | 立即注册
提交评论