為何這款無(wú)源晶振ABLS-LR-24.000MHZ-T能得到無(wú)線模塊的青睞？There are four main sources of heat generation from inductor losses when operating in an application.
They can be categorized into two groups referred to as copper losses and core losses.
1. Copper losses – these are losses primarily due to the inherent DC resistance (DCR) of the inductor’s wire. The wire has a known DC resistance which is a function of the wire length and the cross-sectional area of the wire (aka gauge). The DCR parameter can be found in all the Abracon inductor’s datasheets.
The power dissipated from the effects of the DCR are:
There is, however, a frequency component to copper loss due to what is called the skin effect and
proximity effect. The skin effect is where the electrons traveling through a conductor’s magnetic field are forced towards the outside ‘skin’ of the wire. As frequency increases, the skin effect strengthens causing AC resistance to increase. 
The proximity effect further reduces current (increases resistance) due to magnetic fields of adjacent wires within the coil. Inductor coils with more turns and tightly packed windings will be affected greater by the proximity effect. Power dissipation from these AC effects is calculated by taking the RMS value of only the change in current seen by the inductor (sometimes called ripple current), squaring the RMS value and multiplying by the equivalent AC resistance.
AC resistance (ACR) is a difficult parameter to document due to its dependency on so many factors.
Abracon suggests that designers use an empirical method of measuring the copper loss from AC sources like the skin and proximity effects.
在應(yīng)用中運(yùn)行時(shí)，電感損耗產(chǎn)生的熱量主要有四種來(lái)源。
它們可以分為兩類，稱為銅損失和芯損失。
1. 銅損耗——這些損耗主要是由于電感導(dǎo)線的固有直流電阻(DCR)造成的。導(dǎo)線有一個(gè)已知的直流電阻，它是導(dǎo)線長(zhǎng)度和導(dǎo)線截面積的函數(shù)(又稱量規(guī))。而石英晶振低損耗恰好能夠填補(bǔ)，DCR參數(shù)可以在所有Abracon電感器的數(shù)據(jù)表中找到。

從DCR的效果中耗散的能量是:

然而，由于所謂的蒙皮效應(yīng)和銅損耗有一個(gè)頻率成分鄰近效應(yīng)。蒙皮效應(yīng)是指電子通過(guò)導(dǎo)體的磁場(chǎng)時(shí)被強(qiáng)迫向?qū)Ь€的外部“蒙皮”移動(dòng)。無(wú)源晶振的頻率有效增加，隨著頻率的增加，蒙皮效應(yīng)增強(qiáng)，導(dǎo)致交流電阻增加。

由于線圈內(nèi)相鄰導(dǎo)線的磁場(chǎng)，鄰近效應(yīng)進(jìn)一步減少電流(增加電阻)。線圈匝數(shù)多、纏繞緊密的電感線圈受接近效應(yīng)的影響較大。這些交流效應(yīng)的功耗是通過(guò)取電感看到的電流變化的有效值(有時(shí)稱為紋波電流)，平方有效值并乘以等效的交流電阻來(lái)計(jì)算的。

Manufacturer Part Number  原廠編碼	Manufacturer廠家	Series型號(hào)	Type 系列	Frequency頻率	Package / Case包裝/封裝
ABLS-LR-20.000MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	20MHz	HC49/US
ABM10-19.200MHZ-E20-T	Abracon晶振	ABM10	MHz Crystal	19.2MHz	4-SMD, No Lead
ABLS-LR-16.000MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	16MHz	HC49/US
ABM10-16.3676MHZ-E20-T	Abracon晶振	ABM10	MHz Crystal	16.3676MHz	4-SMD, No Lead
ABLS-LR-6.7458MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	6.7458MHz	HC49/US
ABLS-LR-8.000MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	8MHz	HC49/US
ABLS-LR-5.000MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	5MHz	HC49/US
ABLS-LR-3.579545MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	3.579545MHz	HC49/US
ABLS-LR-24.000MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	24MHz	HC49/US
ABLS-LR-4.000MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	4MHz	HC49/US
ABLS-LR-9.8304MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	9.8304MHz	HC49/US
ABLS-LR-10.000MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	10MHz	HC49/US
ABLS-LR-12.000MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	12MHz	HC49/US

為何這款無(wú)源晶振ABLS-LR-24.000MHZ-T能得到無(wú)線模塊的青睞？交流電阻(ACR)是一個(gè)難以記錄的參數(shù)，因?yàn)樗蕾囉谌绱硕嗟囊蛩亍bracon建議設(shè)計(jì)師使用經(jīng)驗(yàn)方法來(lái)測(cè)量來(lái)自交流電的銅損失，如皮膚和鄰近效應(yīng)。隨著市場(chǎng)對(duì)于石英晶體諧振器的參數(shù)要求增加，優(yōu)化了許多優(yōu)質(zhì)的產(chǎn)品線。