Connector

1. A connector, comprising:

a plurality of contacts of two types, the plurality of contacts of two types being a plurality of signal contacts and a plurality of ground contacts, each contact including,

a contact portion that contacts an object,

a connection portion mounted on a substrate, and

a fixing portion located between the contact portion and the connection portion and in a vicinity of the connection portion; and

a housing, wherein the signal contact and the ground contact are aligned and held in the housing with the fixing portion being press-fitted to the housing,

wherein

the contact portion of each contact has a leading end and an end that is proximal to the fixing portion as compared to the leading end, and when the plurality of signal contacts are arranged between the ground contacts, at least two of the ground contacts are coupled and connected by a separate component at a section of each ground contact between the leading end of the contact portion and the fixing portion, so that high-frequency transmission characteristics are improved;

the connection portion, fixing portion, and contact portion extend in a stepwise shape;

at least the contact portion is located so as to be substantially parallel to the fixing portion; and

each of the connection portion, the fixing portion and the contact portion are arranged to extend in a same virtual plane.

2. The connector according to claim 1 , wherein the at least two ground contacts are coupled and connected by the separate component at a section of each ground contact that is in a vicinity of the contact portion.

3. The connector according to claim 2 , wherein the ground contacts are coupled and connected within a range of 1 mm from a position at which the contact portion contacts an object.

4. The connector according to claim 1 , wherein coupling and connection are achieved by one of: elastic contact by an elastic piece, welding, and fusion bonding.

5. The connector according to claim 1 , wherein three ground contacts are coupled and connected together and two sets of two of the signal contacts are arranged between the ground contacts.

6. The connector according to claim 1 , wherein the separate component is one of a coupling member and a coupler.

7. The connector according to claim 1 , wherein the contact portion comprises a contact surface and a non-contact surface opposite to the contact surface,

wherein

the contact portion is arranged outside the housing and the contact surface is directed outward of the housing; and/or

the contact portion is arranged inside the housing and the contact surface is directed inward of the housing; and

the separate component is located on the non-contact surface side of the contact portion.