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Content preview: Impedance controlled PCB Hi, Signal transmission in the circuit board is expected to be smoothly transmitted from the sending end to the receiving end under the condition of minimum energy loss, and t [...] Content analysis details: (25.5 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 3.6 RCVD_IN_PBL RBL: Received via a relay in Spamhaus PBL [219.133.250.13 listed in zen.spamhaus.org] 4.7 RCVD_IN_XBL RBL: Received via a relay in Spamhaus XBL 1.0 HK_RANDOM_FROM From username looks random 0.5 JMQ_SPF_NEUTRAL ASKDNS: SPF set to ?all [tradepro.net TXT:v=spf1 exists:%{h}.h.%{ir}._spf.tradepro.net ?all] 1.5 SPF_HELO_SOFTFAIL SPF: HELO does not match SPF record (softfail) 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different 1.1 DATE_IN_PAST_06_12 Date: is 6 to 12 hours before Received: date 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [bichengpcb20[at]163.com] 0.2 FREEMAIL_REPLYTO_END_DIGIT Reply-To freemail username ends in digit [bichengpcb20[at]163.com] 0.0 HTML_MESSAGE BODY: HTML included in message 2.4 RAZOR2_CF_RANGE_51_100 Razor2 gives confidence level above 50% [cf: 100] 1.7 RAZOR2_CHECK Listed in Razor2 (http://razor.sf.net/) 4.0 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address [219.133.250.13 listed in dnsbl.sorbs.net] 2.0 PYZOR_CHECK Listed in Pyzor (https://pyzor.readthedocs.io/en/latest/) 0.2 KAM_DMARC_NONE DKIM has Failed or SPF has failed on the message and the domain has no DMARC policy 0.0 KAM_DMARC_STATUS Test Rule for DKIM or SPF Failure with Strict Alignment 0.2 FREEMAIL_FORGED_FROMDOMAIN 2nd level domains in From and EnvelopeFrom freemail headers are different 2.0 RDNS_NONE Delivered to internal network by a host with no rDNS 0.0 FSL_BULK_SIG Bulk signature with no Unsubscribe 0.0 SPOOFED_FREEMAIL_NO_RDNS From SPOOFED_FREEMAIL and no rDNS X-Spam-Flag: YES Subject: ***SPAM*** High Frequency PCB Made on Rogers AD1000 | AD1000 RF PCB This is a multi-part message in MIME format --g9jXul8v1m1WaH26oZZMcoFJNE1hxOT=_Y Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: Base64 Content-Disposition: inline SW1wZWRhbmNlIGNvbnRyb2xsZWQgUENCDQpIaSwNClNpZ25hbCB0cmFuc21pc3Npb24gaW4gdGhl IGNpcmN1aXQgYm9hcmQgaXMgZXhwZWN0ZWQgdG8gYmUgc21vb3RobHkgdHJhbnNtaXR0ZWQgZnJv bSB0aGUgc2VuZGluZyBlbmQgdG8gdGhlIHJlY2VpdmluZyBlbmQgdW5kZXIgdGhlIGNvbmRpdGlv biBvZiBtaW5pbXVtIGVuZXJneSBsb3NzLCBhbmQgdGhlIHJlY2VpdmluZyBlbmQgY2FuIGNvbXBs ZXRlbHkgYWJzb3JicyBpdCB3aXRob3V0IGFueSByZWZsZWN0aW9uLiBUaGlzIGtpbmQgb2YgdHJh bnNtaXNzaW9uIGlzIGFjaGlldmVkIGJ5IGltcGVkYW5jZSBjb250cm9sLg0KIA0KVGhlIGJhc2lj IGVsZW1lbnRzIHRoYXQgYWZmZWN0IGltcGVkYW5jZSANCmEpIFRoaWNrbmVzcyBvZiB0cmFjZSAo VDEpIDclIA0KYikgV2lkdGggb2YgdHJhY2UgKFcxKSA0JSANCmMpIEhlaWdodCBvZiBsYW1pbmF0 ZSAoSDEpIDM1JSANCmQpIERpZWxlY3RyaWMgY29uc3RhbnQgb2YgYm9hcmQgbWF0ZXJpYWwgKEVy MSkgOCUgDQogDQpUaGUgY2xhc3NpZmljYXRpb24gb2YgY2hhcmFjdGVyaXN0aWMgaW1wZWRhbmNl DQpTaW5nbGUgZW5kZWQgKGxpbmUpIGltcGVkYW5jZQ0KRGlmZmVyZW50aWFsIGltcGVkYW5jZQ0K Q29wbGFuYXIgaW1wZWRhbmNlDQogDQpQQ0IgU2VydmljZQ0KUHJvdG90eXBlcywgU21hbGwgcnVu cyBhbmQgbWFzcyBwcm9kdWN0aW9uIHN1cHBseQ0KMi0zMiBsYXllcnMNClZhcmlvdXMgc3VyZmFj ZSBmaW5pc2g6IEhBU0wsIEltbWVyc2lvbiBnb2xkLCBJbW1lcnNpb24gdGluLCBJbW1lcnNpb24g c2lsdmVyLCBPU1ANClZhcmlvdXMgc29sZGVyIG1hc2s6IEdyZWVuLCBCbHVlLCBNYXR0IGJsdWUs IFJlZCwgWWVsbG93LCBCbGFjaywgTWF0dCBibGFjaywgV2hpdGUNClZhcmlvdXMgdGVjaG5pY3M6 IEJHQSwgQmxpbmQgdmlhLCBFZGdlIHBsYXRlZCBjYXN0ZWxsYXRpb24sIFByZXNzIGZpdCBob2xl cw0KIA0KQXBwbGljYXRpb25zOiANClN5bmNocm9ub3VzIGRpZ2l0YWwgaGllcmFyY2h5IChTREgp LA0KR1NNLCBDRE1BLCBQQyBhbmQgaGlnaCBwb3dlciB3aXJlbGVzcyBwaG9uZSBldGMuDQpJZiB5 b3UgaGF2ZSByZXF1aXJlbWVudCBvbiB0aGUgaW1wZWRhbmNlIGNvbnRyb2xsZWQgUENCJ3MsIHBs ZWFzZSBzaW1wbHkgcmVwbHkgYmFjayB0byB0aGlzIGVtYWlsIGJ5IHlvdXIgZ2VyYmVyIGZpbGVz IGFuZCB3ZSB3aWxsIGdldCBiYWNrIHRvIHlvdSBBU0FQLiANClJlZ2FyZHMNCkphbmUgU2hpIHwg QnVzaW5lc3MgZGV2ZWxvcG1lbnQNCkJpY2hlbmcgUENCICB8ICB3d3cuaGlnaGZyZXF1ZW5jeXBj Yi5jb20gfCBNYXRlcmlhbCBwYXJ0bmVyczogUm9nZXJzLCBUYWNvbmljLCBJVEVRLCBTSEVOR1lJ LCBUQUlZTywgS1VBTkdTSFVODQpJZiB5b3UgZG8gbm90IHdhbnQgdG8gcmVjZWl2ZSBlbWFpbHMg ZnJvbSBCaWNoZW5nIGFib3V0IG1hcmtldGluZyBjb21tdW5pY2F0aW9ucyBhbmQgc3BlY2lhbCBv ZmZlcnMsIHJlcGx5IGFzIOKAnHJlbW92ZeKAnSBpbiB0aGUgc3ViamVjdCBsaW5lLg0K --g9jXul8v1m1WaH26oZZMcoFJNE1hxOT=_Y Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: 8bit Content-Disposition: inline

Impedance controlled PCB

Hi,

Signal transmission in the circuit board is expected to be smoothly transmitted from the sending end to the receiving end under the condition of minimum energy loss, and the receiving end can completely absorbs it without any reflection. This kind of transmission is achieved by impedance control.

The basic elements that affect impedance
a) Thickness of trace (T1) 7%
b) Width of trace (W1) 4%
c) Height of laminate (H1) 35%
d) Dielectric constant of board material (Er1) 8%

The classification of characteristic impedance

Single ended (line) impedance
Differential impedance
Coplanar impedance

PCB Service

Prototypes, Small runs and mass production supply
2-32 layers
Various surface finish: HASL, Immersion gold, Immersion tin, Immersion silver, OSP
Various solder mask: Green, Blue, Matt blue, Red, Yellow, Black, Matt black, White
Various technics: BGA, Blind via, Edge plated castellation, Press fit holes

Applications:

Synchronous digital hierarchy (SDH),

GSM, CDMA, PC and high power wireless phone etc.

If you have requirement on the impedance controlled PCB's, please simply reply back to this email by your gerber files and we will get back to you ASAP.

Regards

Jane Shi | Business development

Bicheng PCB | www.highfrequencypcb.com | Material partners: Rogers, Taconic, ITEQ, SHENGYI, TAIYO, KUANGSHUN

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